Cool ideas so far, everything sounds interesting. Otherwise don't consume all your ideas in one design, choose wisely
Do you have any idea how Tarja and Noqi connected together? Maybe this is important for both, maybe they are dependent somehow?
For the cloth design ask yourself, what Tarja really needs. Is she an agile character, so maybe “5“ wouldn’t work because of the skirt would trouble her while running/climbing. Is she kinda tanky, so give her more armor stuff. Someone told me „everything a character wear is for a reason“, this sentence blows my mind and it makes sense (for me it does ^^)