Krsna never leaves the original Vṛndāvana in the Spiritual Sky. Also, no demons exist there, nor do any of the inhabitants experience separation from Kṛṣṇa there like they do in the Vrindavana in the material world, simply because Krsna NEVER leaves them.

The jiva-souls (marginal living entities) are eternal PERSONS, as a spiritual bodily form like Krsna's Body, whose perpetual permanent natural home is the spiritual world.

God (Krsna) is not ONLY an all-pervading consciousness who is even in the atom, no, Krsna the Supreme Personality of Godhead and cause of all causes, is also simultaneously an individual "PERSON" as an eternal spiritual bodily Form, who's Bodily rays ARE the Brahmajyoti.

Only Krsna has 64 qualities in full all the time because He is the original Supreme Lord.

Kṛṣṇa’s first expansion is Balarama from whom all Visnu-tattva expansions manifest however, all manifestions, including the jiva-souls, are beginningless and endless because they are eternally part and parcel of Kṛṣṇa. 

And for Kṛṣṇa to experience loving relations with a women, He divided Himself into two, and that is how Radharani appears, the paradox is Radharani is also eternal because Radharani is eternally part of Kṛṣṇa.

Kṛṣṇa as His original form NEVER leaves Vṛndāvana in the spiritual world. All of Krsna’s pastimes in the material creation, including killing demons, are carried out by Krsna's Visnu-tattva expansion, in the spiritual world no demons exist or are killed by Krsna and Balarama. 

Srila Prabhupada - "When Kṛṣṇa kills the demons outside Vṛndāvana, He is not original Kṛṣṇa; He is Vāsudeva. Vāsudevaḥ sarvam iti (BG 7.19). When Kṛṣṇa is acting universally, that is Vāsudeva. The original Kṛṣṇa is always in Vṛndāvana and never leaves." (Morning Walk, July 17, 1975, San Francisco)

Srila Prabhupada - "The original Lord Kṛṣṇa never leaves Goloka Vṛndāvana. All the plenary expansions are one and the same Viṣṇu-tattva, and there is no difference in Their potency." (SB, Canto 3 Ch 1 Text 34)

Srila Prabhupada - "Kṛṣṇa is the original Supreme Personality of Godhead, and Baladeva (Balarama) is Kṛṣṇa's immediate expansion. Because Kṛṣṇa NEVER leaves Vṛndāvana, all the forms of Kṛṣṇa that appear elsewhere are His expansions." (BG, As It Is Ch 10 Text 37)

Also, the intense separation Radharani and the gopis felt for Kṛṣṇa only happens in the facsimile Vrindavana in the material world because only there does Kṛṣṇa often leave their association but this is not so in the spiritual world (Vaikuntha).

The word "Vaikuntha" means "without anxiety" therefore how could there be demons there? And how could the gopis ever feel separation from Kṛṣṇa there? After all Krsna NEVER leaves Goloka Vrindavana.

Jayatīrtha - "If the original Kṛṣṇa is always in Vṛndāvana, then why do the gopīs and Rādhārāṇī feel separation from Him?"

Srila Prabhupada - "That is here, in this material world. In the spiritual world Kṛṣṇa does not leave."

Jayatīrtha - "Oh."

Srila Prabhupāda - "And even in the material world, Kṛṣṇa superficially has gone to Mathurā, but He has captured the heart of the gopīs. So He is not leaving. Gopīs are enjoying Kṛṣṇa by separation. That is Caitanya Mahāprabhu's feeling, how He is appreciating Kṛṣṇa by separation." (Morning Walk, July 17, 1975, San Francisco)

Srila Prabhupada - "The human form is the full manifestation of the jiva-soul." (Melb, May 20, 1975)

Srila Prabhupada - "The spirit soul is NOT formless; it has got form, the spirit soul always has form and is expressed as hands, legs, heads, everything. But with our material eyes at the present, our gross eyes, we cannot see these facts; therefore we foolishly believe the jiva-souls have no form." (Lecture BG, Ch 2 Text 14, Mexico, Feb 14, 1975)

Devotee – "Is the original body of the spirit soul a human form?"

Srila Prabhupada – "Yes, human form. God is also human form. "Man is made after the shape of God." I think there is in the Bible. Is it not? So God is also like human form. Here you see Krsna, two hands, two legs."

Hari-sauri – "How do we understand, then, that there are peacocks and flowers and trees in the spiritual world? Are these not eternal forms?"

Srila Prabhupada – "[describing material form first]: Yes, they are more covered in the material world, just like if you cover your body with blanket, the hands and legs are invisible. But you are not the blanket. So the trees and plants, they are more covered. They are NOT in full manifestation of the jiva-soul. The human form is the full manifestation of the jiva-soul."

Hari-sauri - "They are covered in the spiritual world?"

Srila Prabhupada - "Not in the spiritual world, there the form one chooses is voluntary, some devotee wants to serve Krsna as flower; they become flower there. If I want to be a flower I shall lie down at the lotus feet of Krsna, he becomes flower, voluntarily, and he can change his, from flower to human body. That is spiritual life. There is no restriction. If some devotee wants to serve Krsna as cow, he serves Krsna as cow, as calf, as flower, as plant, as water, as ground, field, or as father, as mother, as friend, as beloved, anything. It is inconceivable, yet a fact." (SB, Canto 6 Ch 1 Text 1-4 Melb, May 20, 1975)

Srila Prabhupāda - "The impersonal conception of the Supreme is so detrimental to the path of devotional service that it is very difficult to associate with the stubborn nondevotees who always think in terms of material conceptions. 

Impersonalists always think backwards. 

They think that because there is form in matter, spirit should be formless; because in matter there is sleep, in spirit there cannot be sleep; and because the sleeping of the Deity is accepted in arcanā worship, the arcanā is māyā. All these thoughts are basically material. To think either positively or negatively is still thinking materially. Knowledge accepted from the superior source of the Vedas is the standard." (SB, Canto 3 Ch 9 text 21, Purport)

Srila Prabhupada - "Each "person" (jiva-soul) is eternal. Lord Krsna says that He existed as a person before the creation (agre) and will also exist after the annihilation, the Lord is a "person" eternally." (SB, Canto, 6 Ch 4 text 47, Purport)

The jiva-souls (marginal living entities) are eternal PERSONS as a spiritual bodily form like Krsnas Body, and whose eternal permanent home is the spiritual world.

Bhagavad Gita As It Is - "Never was there a time when I did not exist, nor you, nor all these kings; nor in the future shall any of us cease to be." (BG, Ch 2 Text 12)

Bhagavad Gita As It Is - "For the soul there is neither birth nor death at any time. He has not come into being, does not come into being, and will not come into being. He is unborn, eternal, ever-existing and primeval. He is not slain when the body is slain." (BG, Ch 2 text 20 "corrected" 1983 edition)

Srila Prabhupada – "There are no new souls, new and old are due to this material body, but the jiva-soul is never born and never dies, so if there is no birth, how can there be new souls?" (Letter to Jagadisa Dasa, 7/9/1970)

After the annihilation of everything in the material world, the Supreme Lord remains always as sac-cid-ānanda-vigraha, eternity, knowledge, bliss and form (Bs. 5.1).

Maha-Visnu (Krsna) remains in His original form, but since the other living entities (jiva-souls) have material bodies, that matter merges into matter, and the subtle form of the jiva-soul remains within the body of the Lord (Maha-Visnu). 

The Lord does not sleep, but the ordinary living entities (jiva-souls) remain asleep in the Body of Maha-Visnu for 311 trillion, 40 billion years, until the next material creation and Brahmandas appear. 

The fallen jiva-souls are still "outside" of the spiritual world's of the Vaikuntha planets, and Goloka-Vrindavana because they are not qualified to return back home back to Godhead. 

Their real home and spiritual bodily form eternally exists in the spiritual world of Goloka-Vrindavana and the Vaikuntha planets, therefore, being "outside" the spiritual world means they are "fallen" in either the temporary material world, merged as an individual dormant unit [spark] in the impersonal Brahmajyoti and therefore in the already fallen condition known as tatastha-sakti. 

When "fall down" of the jiva-soul takes place, it means falling down from a "non-fallen" condition, and that non-fallen condition is with Krsna in Goloka Vrindavana, or with Visnu in the Vaikuntha planets. 

Anything outside the spiritual world like entering the Body of Maha-Visnu, the material creation, the impersonal brahmajyoti and tatastha-sakti are ALL already fallen conditions.

As said above, entering the brahman effulgence (impersonal brahmajyoti), is an already "fallen condition" however, the jiva-souls can never eternally remain in that "fallen condition" in the impersonal brahmajyoti. 

Eventually they are forced to leave thpoolere because the eternal nature of the jiva-souls is to be always "active," not inactive. So again they take birth in the material world.

Many of those "fallen jiva-souls in the impersonal brahmajyoti," have spent so long inactive there, they forget they originally fell from the spiritual world to the material world, then after suffering there for many life times, try and escape the material world's repeated painful cycle of birth and death, by entering that dormant (inactive) condition in the impersonal brahmajyoti.

Sadly, because they have spent so much vast time in the impersonal brahmajyoti (trillions of years being dormant), they foolishly believe it is their origin, forgetting they have NOT originated from the impersonal brahmajyoti but had previously fallen down from either the Vaikuntha planets, or Goloka-Vrindavana.

The opulence of the Supreme Personality of Godhead permanently remains as it is in the spiritual world; only in the material world does everything dissolved and decay and in need of constant maintenance. 

Srila Prabhupada - "When the material body is annihilated, the jiva-soul remains in a subtle form, which later assumes another material body. This is true for the conditioned souls, but the Supreme Personality of Godhead remains eternally in His original consciousness and spiritual bodily form." (SB, Canto, 6 Ch 4 text 47, Purport)

Devotee - "I want to know exactly what is the form of the body. If the spirit soul (jiva-soul) is nonmaterial, what is the form?"

Srila Prabhupāda - "There is form. Just like this body is compared with the dress. Now, just like in your present material form you have got hand; therefore your coat has got hand, you have got leg; therefore your pant has got leg. Therefore, it is to be assumed that the spirit soul has got form, and it has developed into hands, legs, heads, everything. It is not formless; it has got form. But with our material eyes at the present, gross eyes, we cannot find it; therefore we say it has no form." (Lecture BG, Ch 2 text 14 Mexico, Feb 14, 1975)

Devotee - "Śrīla Prabhupāda, you state that spirit soul has form."

Srila Prabhupāda - "Yes."

Devotee - "Otherwise, how is the material body grown to accommodate the spirit soul? Just like a shirt has no form, but when it's put on the body, it takes the shapes of the body. Does that mean that the jiva-soul has the shape of the body that is accommodating it?"

Srila Prabhupāda - "Yes, you have got body, shape, very minute shape, that we cannot see, we cannot measure. Therefore in the Bhagavad-gītā it is said, anumeyam. You cannot measure. What is that word used? Aprameyam. Aprameyam, you cannot measure but it has a form. What is the length and breadth of that form, that is not in your power to understand, not materially. If you have got spiritual power then you can measure it. And that measurement is also given in the śāstra. What is that? One ten-thousandth part of the tip of the hair. Hair is a very small point. And divide it into ten thousand parts. That one part is the measure, magnitude of the soul." (Lecture SB, Canto 1 Ch 16 text 24 Hawaii, Jan 20, 1974)

The jiva-souls natural home is in the spiritual energy with Krsna in Goloka Vrindavana as individual spiritual PERSONS like Krsna.

The jiva-souls are eternal PERSONS called the "marginal living entities" meaning they can be influenced by either the spiritual energy, or the material energy explained by Prabhupada.

Srila Prabhupada – "The jiva-souls are Krsna’s marginal energy. Marginal energy means the jiva-souls may be under the control of the spiritual energy, or they may be under the control of material energy. But when the jiva-souls are under the control of the material energy, that is their precarious condition, struggle for existence. And when they are under spiritual energy, that is their original position and life of freedom." (Los Angeles, Nov 23, 1968)

Srila Prabhupada - "Regarding your question about our relationship with Srimati Radharani, She is the internal energy, we are marginal energy. Marginal means sometimes internal, sometimes external. When we are under the internal energy, that is our normal life, and when we are under the external energy, that is our abnormal life. Therefore, we are called marginal energy; we can be either this way or that way. But being qualitatively one with the purusa, our tendency is to remain in the internal energy. Being in the external energy is our artificial attempt." (Letter to Lilavati, Allston, Mass 25 April, 1969)

Srila Prabhupada - "We (the jiva-souls) are marginal energy (jiva-souls) Marginal means sometimes internal, sometimes external. When we are under the internal energy, that is our normal life, and when we are under the external energy, that is our abnormal life. Therefore, we are called marginal energy (jiva-souls); we can be either this way or that way. But being qualitatively one with the purusa, our tendency is to remain in the internal energy. Being in the external energy is our artificial attempt." (Letter to Lilavati, Allston, Mass 25 April, 1969)

Srila Prabhupada - "The material energy, called as Maya, is also one of the multipotencies of the Lord, as much as we (the jiva-souls) are also marginal potency of the Lord. The living entities (jiva-souls) are described as superior energy than matter, when the superior energy is in contact with inferior energy, it becomes an incompatible situation. But when the supreme marginal potency (jiva-souls) are in contact with the spiritual potency, Hara, it becomes the happy, normal condition of the living entity." (The Happening Album, New York City, Dec 1966)

Srila Prabhupada - "You are also energy; you are marginal energy (jiva-soul). Marginal energy means you (the jiva-souls) may be under the control of the spiritual energy or you may be under the control of material energy—your marginal position. But when you are under the control of the material energy, that is your precarious condition, struggle for existence. And when you are under spiritual energy, that is your life of freedom." (Intro BG, As It Is, Los Angeles, Nov 23, 1968)

Srila Prabhupada – "The jiva-souls are Krsna's marginal energy. Marginal energy means we can live either in this external energy or in the internal energy, in between. So at the present moment we are living in the external energy. But this external energy is also Kṛṣṇa's energies, God's energy. It is not different from Him. But the external energy means we are captivated by the external energy. But the external energy is not permanent. The internal energy is permanent. The spiritual world is permanent, and the jiva-souls are also permanent as Bhagavad Gita As It Is Chapter 2 text 20 (1983 edition) reveals." (Lecture BG Ch 9 Text 4 Melb, Australia April 23, 1976)

Krsna is the Supreme Personality of Godhead and cause of all causes.

This includes being the original cause of all Narayana/Visnu expansions from Goloka Vrindavana, who set up the perpetual unlimited Vaikuntha planets that surround Goloka-Vrindavana, collectively with Goloka-Vrindavana, taking up 75% of the Spiritual Sky. 

And Maha-Visnu, Garbhodakashayi Visnu and Ksirodakasayi Visnu (Paramatma) build and maintain the material creation that takes up 25% of the Spiritual Sky, which is the temporary (decomposing) material world.

Krsna is therefore the original source of Maha-Visnu who creates the material universes called Brahmandas that originate from His breathing and the pores of His skin as seen in photo below.

Furthermore, deep inside each Brahmanda material universe, there is a "secondary inner" enclosed universe where Maha-Visnu expands as Garbhodakashayi Visnu, from whom Lord Brahma appears and builds the many planetary systems in his material universe. 

There are unlimited Brahmanda universes, each having a secondary universe inside of them meaning each has their own Garbhodakashayi Visnu and Lord Brahma.

In these "secondary material universes" created by Garbhodakashayi Visnu within each Brahmanda universe, Lord Brahma builds the planetary systems, in our universe there are 14 planetary systems.

In other material universes deep inside their Brahmanda universe, they have many more planetary systems than just fourteen.

Our secondary material universe inside our massive Brahmanda universe is one of the smallest.

The size of each Brahmanda and inner universe depends on how many heads Lord Brahma has, in our material universe he has four heads, while in other material universes Brahma may have 10, 20, 50, 100, 100,000, one million or 10 million. The workings of this material universe is beyond our comprehension.

There is only one Maha-Visnu but there are a unlimited number of Garbhodakashayi Visnus, Lord Brahmas and demigods (administrators within each material universe who are in charge of a particular field like ministers portfolios in the Government)..^^^..