Octavia: Yui's gothic Step-Sister (Diabolik lovers)

(My AU) She was adopted by Yui's Stepfather even though she wasn't aware of it but she was treated like a

freak and she was born half broken but mostly demon and her family was killed by A fire set by the

war in her kingdom but she managed to escape into the mortal world but stayed in the church until

one day her and her sister we're told to live in Sakamaki household with the brothers how would they treat her like?

Well Yui try to kill her own sister somehow out of jealousy?

And will she fall in love?
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Trigger warnings ⚠️

Mental illness
Abuse from adopted family
Mistreatment
Violence/anger issues
Murder
Mentions of death

Characters:
Kanato Sakamaki
(He/him age 17)

Octavia Shards
(She/her age 17)

Yui
(She/them age 17)

Ayato Sakamaki
(He/him age 17)

Laito Sakamaki

(He/them age 17)

Subaru Sakamaki

(they/them age 16)

Shu Sakamaki
(He/them age 19)

Reiji Sakamaki
(he/him age 18)

(Will include music and best experience with headphones)

(Ps. I do not own the anime just the original character)