Tenshi's theme and apparent origin both reference Bhava-Agra, also known as Naivasaṃjñānāsaṃjñāyatana. Here's the wiki entry:
Naivasaṃjñānāsaṃjñāyatana or Nevasaññānāsaññāyatana (Tib: 'du shes med 'du shes med min) "Sphere of neither perception nor non-perception". In this sphere the formless beings have gone beyond a mere negation of perception and have attained a liminal state where they do not engage in "perception" (saṃjñā, recognition of particulars by their marks) but are not wholly unconscious. This was the sphere reached by Udraka Rāmaputra (Pāli: Uddaka Rāmaputta), the second of the Buddha's two teachers, who considered it equivalent to enlightenment.
- ZUN has been merciful. The place is clearly at least physical. But it's still a place where everyone around her doesn't notice her at all. Or not notice her, but they certainly aren't giving her attention. That is no place for a child.
- Well that would certainly explain her desire for attention.