> we never knew about her (exc her love for attractive boys and that she had tons of pet hamsters) or her parents. there was a single picture but the parents were crossed out.
> she live alone / her parents are constantly out of picture
> in tsuchigomori's library, she was supposed to have a boyfriend who end up breaking up with her due to her daikon-legs, just before her supposed death.  
> there was no sign of her romance with that 'boyfriend' until now. 
> she can alter her future (?) like what hanako-kun did. 
> there are suggestions that she might become the 8th school mysteries from a kanji from her name (foreshadowing)
> I mean she's somewhat a half-mermaid now.
> she was always watching. always. to the point other characters outshine her.
> how the fuck she's able to time travel and meet young hanako ?!
> farfetched, might be because hanako love her so much but--
> why hanako don't want her to die no matter what