[@MeteorD]
Yeah, that's my bad on the Skills number. Function's analogous, and I allowed the same with Nessus, so I see no reason to say no.

Sisterly Bond as a concept is fine, I just don't think there's enough grounding in the legend to warrant making it an A-ranked skill, hence B.

So you're saying if she uses it on her own it won't work, if she uses it with someone's help it will work, and if she uses it with a Sister then it works with the modifier active? That's fine then, though clarify the medium through which it works like what we have with Shuten.

You could always do it like antagonistic interference made with killing intent is nullified or something.