She is cursed human and have star on forhead. whit curse she can see akuma and also see akumas attack before akuma makes its move.
The sword was her dads sword. when her dad died on cancer he wanted him back what was mistake!
Her akuma dad curset her.
she then attacket her dad whit the sword and boom innocence activated and the akuma died.
then she blacked out and she waked up when exorcist came chek was she okay.