these alters have never been to a doctor, so they Wouldn’t know the term to refer to such a occasion.
to them, they are literally disappearing to a place they don’t know, they don’t realize they’re integrating.
or so is what i tell myself lmfao. i’m super nit picky too so i end up making headcannons up as a go to deal with that lmfao
Yeah none of them know what integration is called, i think.
Rei used the specific term once, but even then he said that "it felt like integration" not that it was. I think that means Michinoku-sensei knows what is is though, since she took a moment to specifically point it out and she says they are "returning".

am i the only one put off by the word disappearing? like they dont disappear...they integrate........man whatever imma just read this as a dumb little dumb dumb and enjoy the ride cuz if i start nitpicking at everything im never gonna stop djdkdk just wish the author didnt use the word disappear ┑( ̄Д  ̄)┍