sure if you wanted it to be more sadistic. i'll fine tune catherine to be traumatised, but the fact is i want to oeverrun to something bloodthrist like Ophelia( although she does have a good side )
Secondly, your character needs to be more...tragic I guess. You have the potential device (split persona) but you're using it wrong. The other side could be the traumatized side that's more like Ophelia, that often recounts tails of "her" death (when really it's the original side remembering) and is pretty sadistic. The internal struggle would make for something interesting I guess, just don't have to two sides conversing casually.
since you all didnt state any downside to your character i remove that portion, or rather little of it. beacause a greater heal would need to realease their yoki, which mean she would easier past 30% and therefore awaken catharina..
Being 1/4 1/4 seems redundant, it's basically 1 person with a split personality. Your skill is basically healing through alignment. But you have to think how that would work and what would be the downside to it. Right now it sounds a lot like a clean/perfect version of my characters reverse drain, which essentially works a lot like your skill does (even if I were to go scientific the theory is still pretty much the same). You also haven't decided a type yet, which is weird because you listed such a defensive skill/character.
Drain: Through close contact with the target Yoma, Kaiserin can drain the opponents stamina and uses it to increase her own stamina. Opponents feel tired and their endurance goes down greatly. Drain can also be used in reverse, giving an ally some of Kaiserin's stamina, or by using Kaiserin as a catalyst, transfer stamina from one Claymore to another.