I am startled. You call that violent? It was just a prank against some guy discriminating people for being a "sump-rat".
If you consider that violent, what do you expect from your champ then?
She would have to be a complete pacifist up to this point that she completely forbids her allies to kill the enemy as long as she is anywhere close.
This is what I meant. This kit is completely passive, it doesn't require any interaction directly with the enemy (and that was your goal, no direct combat abilities).
And this is something that this game tries to get away from. It is not fun for the enemy if there is a support that stays way behind just influencing the battle indirectly through her teammates.
I want to point out:
It is not my goal to say the archetype you envision is impossible.
Having some kind of Himedere champ could be fun.
I just think that it is pretty challenging to implement this in a right and healthy way, since such a personality will usually be associated with passiveness.
If Riot can figure out a way to do this, then it would be a nice addition.