Beast beneath the Moonlight Ability (Byakko) & Nakajima Atsushi Backstory Theory
- Another Life or Ability from the Book
- Atsushi may not be an Ability User originally (maybe)
- revised ver.

So let me start with Byakko, Byakko maybe an another life and ability that is created from the book* because in a scene in Dead Apple, Atsushi said that the tiger and him are actually seperate creatures and this maybe why Shibusawa called it a "Supreme Special Ability" because it

is an another life, besides being an ability that is an antithesis of all special abilities.

That's why Atsushi and Byakko maybe 2 lives in one body hence why he has heterochromia eyes to represent the 2 lives in Atsushi's body (Atsushi himself and Byakko)

And this brings me to why Atsushi may not be an ability user originally, since he said he and byakko are seperate creatures. Maybe when he was a normal child, he was a sickly child or maybe there was a circumstance where he was barely living he then was given byakko, another life

inside of him to support him/his body while also being an ability thats why he said (read gif) thats why i think Atsushis life maybe co-dependent on Byakko and vice versa

Another reason why i thought that Atsushi wasn't an ability user originally is because in dead apple even when atsushi defeated byakko(w/gem) atsushi didn't have his ability back because maybe he had no ability to begin with and was just doing the bidding of Byakko who is another

life in his body to stop or end the Byakko(w/gem) and he needed to acknowledge Byakko again to use the Beast beneath the moonlight ability

or maybe atsushi is like my chuuya theory that he, Atsushi is 'another experiment' that the government was doing,he was given the ability

there and somehow he escaped because of byakko (like byakko and shibusawa in  dead apple) and then after roaming around he ended up in the orphanage.

//END
*Why i think Byakko is from the book will be answered in another revised thread

(!)Reactions & Other thoughts are welcome

P.S: ATSUSHI IS AN ABILITY USER TODAY HE IS WHAT HE IS TODAY AND HE IS AN ABILITY USER (I just want to let this out)

Btw, here is the original ver. of this thread which includes Natsume, Book owner and parents of atsushi https://twitter.com/kokuto_zessuo/status/1309445112456331264?s=19