Well....

The goal here is to kill Korosensei.

And since he's really really REALLY hard to kill...

Rosie would go to extreme measures to kill him.

How extreme, you ask?

Weaponizing HATE.

She would gather viles of the stuff from her brother, her father, her mother, everyone.
(In my Universe, everyone has a little bit of HATE in their hearts)

And then she would inject herself with it.

And then....

Attack Korosensei.

What is Class 3-E to do....?