While Chiaki is wondering in the fantasy world at the moment. Her friends and doctors are trying to bring about her recovery. Chiaki will eventually waken but will still be between two worlds. This leads to another theory based on American McGee's Alice. Where she would find the two worlds merging in her mind.
The flaw in the latter is that Chiaki may become insane and be committed to a mental institution which can't exactly happen given how she will eventually become a highly respected Manga artist as seen in Rain.
Alternatively, Chiaki isn't in a coma, but is experiencing some kind of astral projection like in John Carter of Mars or Insidious.
- Jossed, Chiaki appears to wake up in her homeworld near the end of Chapter 1, but that's just a dream, as she wakes up and is still very much in the other world.
- Confirmed with mentions of the Age of Lilim and Princess Kaminari. (The events are even given specific spots in the Other World timeline, with BotL taking place >3000 years before MIS and BWK taking place 16 years prior.)
Either the skyfolk chose to come to the surface or they had to.
- Jossed from the get-go. Even before we knew of Kaminari and Nagisa, Rain's loredump told us that the "other child" survived the fall alongside Kaminari and was raised by a human family, matching with what we know about Nagisa, and Kaminari and Nagisa appear as protagonists of separate Koizumi mangas, proving they're not one and the same.
- Watsonian perspective: Given Chiaki's circumstances (and MIS's author), Chiaki's likely finding out she's demi before getting back home. She'd likely end up coining the phrase for convenience's sake.
- Doylist perspective: "Demisexual" wouldn't be coined until 2006, whilst *MIS* is set in mid-2000. Having Chiaki come up with the phrase herself would be a convenient workaround for that minor anachronism.
- Additionally. She coins it after learning the term “demi-human” from the other world.
- Spirit, due to Chiaki being Unbound and all.
- Fire-aligned, which could help Chiaki and Nagisa bond even further and maybe even cause Nagisa to unseal hers after watching Chiaki use it.
- Light, because Chiaki needs a way to charge the battery of her UsaMaMa-chan.
- Something new, or a multi-alignment; it's a more exotic answer, but she is Unbound, so maybe certain rules don't apply to her?
- Additionally, maybe there's another alignment that she has that is undiscovered or maybe once considered extinct, having not appeared for many generations?
- Going this way, maybe she has an "Observer" alignment, giving her magic around enhancing senses - possibly telepathy. It could explain why she could hear Fumiko for a period; she was hearing her thoughts across the divide, her body being there while tapping into the magic here. Particularly strange, perhaps, but also she was stressed and didn't have control of her powers, whatever they may be.
- Chiaki has no alignment, as alignments only apply to those born under the stars of the "Other World".
- All of these have been jossed. Chiaki's alignment is Wind.
- With how many teasers regarding the thieves Lynn gave prior to Chapter 4 and the fact that Chapter 4 started with and seems to be focusing on them, this theory looks like it's getting stronger.
- Confirmed.
- Arc: An orphaned street merchant who was found and taken in by Harley.
- Rhys: A servant of Bonnie's family who Bonnie had fallen in love with against the wishes of her family (who'd bethrothed her to Theo). He was also mistreated by Bonnie's family and grew weary of them.
- Jossed; while how he met Bonnie remains unclear, he is an Unbound.
- Harley: A street urchin who was sought out by and offered to join the thieves (especially considering he was the only one who knew sign language) but refused to accept unless they let Arc in too.
- Jude: Jude attempted to examine the cursed choker that he now wears, but it automatically latched onto his neck as soon as he touched it.
- Bonnie: A princess of the Rose Kingdom who survived the demise of her family due to being sent to study at the GAL, she eventually found herself at the mercy of scheming nobles. Four years prior to the main story, one of those schemes (probably engineered by Theo's father) resulted in Bonnie being forced out of the upper echelons of society, eventually causing her to join the bandits.
- Jossed; she ran away from her apparently abusive royal family together with Rhys, bringing her into a life of banditry.
- Extra cute points available if Koizumi still uses an UsaMaMa-chan as a fidget and Lydia recognizes Momokomo.