no, she will be able to fight like with her knife. Also like in the ones justice game she will probably be able to turn into the person she's fighting which will be kinda cool

PLUS maybe like in My Villain Academia she will be able to use the person she transformed into's quirk

But that would be to op and hard to fight with

Toga will have knife, but her knife only drain their blood, nothing more, not like stain. He can paralyze the enemy (there is also aid so she won't do much damage)