you are a ghost in girl's house

The Angel of slaughter... the greatest killer among the heavens, he is the one sent to kill people that arent supposed to live on this planet, he is strong, but he lacks any magic and isnt really the smartest one. He kills what gods order him to, he is the toughest angel up there and scarier than even the demons, to sum it all up, just the undertaker of the scum on this planet. And unfortunatelly for you, you are nothing more than his new target.

Based on Isaac "Zack" Foster, killer angel

cute friend's sister

you ruined him...

Hakichima is just a normal high schooler, black hair, green eyes, bullied, unpopular.

You are a demon (female or male) named Aukishira, you live inside Hakichima's body for a few weeks, since you possessed him. You two agreed to be friends so you decide to lend him your power every once in a while.