Ya no. I don't think you actually know anything about the other girls. Tina is a wrestler, she does theatrics like that gyrating bit. And her "YEAH I'M GONNA ROCK YOU!" Inb4 "uuuuhghgh showboating" she learned wrestling from her dad who hams it up like crazy. Is that okay because he's a dude though? Hmm
Tina's hobbies are fighting games and bike riding. She starred in a war action movie. She became a rockstar and in her music video skateboarded while playing an electric guitar. Tomboys can be show offs, and they don't always have to be down to earth.
Like you said the outfits, movements, and mannerisms are because she's an opera singer. Also both of her parents were murdered, she was imprisoned by Donovan, and then she was forced to take over a company with shameful secrets. She has an enormous weight on her shoulders. If she ever acts like a 'drama queen' (which I don't recall her ever really doing) she has reason to. If she was so prissy and fake, why would she go to a gross dive bar in 5 and strike up a conversation with Bass and sit at the bar to get a drink?
I have absolutely no idea what you're talking about. When has she ever acted like a "little princess?"