So a few things about Diana. One is fairly general: I still want a little more from non-combat, but that is my fault. I'm just going to change the category to make it broader.
As for the whole 'raised by Grimm thing', I think I like it, but playing it without any sort of spin rubs me the wrong way, seeing as it goes really hard against canon. It does, however, give me opportunities to go bonkers with plot ideas, so if you're ok with me roping you into secretive plot goodness unbeknownst to your character, I'm good to go.
As for the teleportation, I think I'm going to want a range limit. Being able to move at the equivalent of thousands of miles per hour (by for example teleporting into the air and then shooting through the skies with aplomb.)
Other than that, looks good to me. I do think, however, that we have enough Faunus, seeing as iirc they are a very small minority of the population.