She's not an unsalvageable character, she just has very very few character flaws, most of which are humblebrags, and is rather OP in terms of ability. I'm sorry for overexplaining and probably seeming like a pretentious asshole. (Actually, maybe I'm not? Like I'm sorry if I seemed like an asshole but overexplaining can be good for criticism). Points still stand, though. This is not a character who is conductive to a balanced roleplay, and a character who is unfortunately an archetype of what is known as the Mary Sue, or as the writerchat deemed it in TVTropes form, Power as the Plot Demands It Manic Pixie God Mode Sue.