For a cat mage, how about Pandora? It's mysterious, feline, and powerful.

Also, some other good names would be:
Eve
Adel
Personality
Persona

I'm usually good with names... ugh, I hate how people usually name characters something asian inspired like "Takashi" or "Himo-ika" it's just getting a bit annoying, like seriously, dig into your own heritage and stop stealing the Japanese's... lol, that wasn't directed to you- just annoying masses

I like the picture. As for clothing, I would have to know what kind of mage she is. White, black, green, powerful, training, insane, lawful. Lol.

Seeing, however, how she is in a cute stance with an innocent look, I would say go with pastel colors. Perhaps a pale yellow robe with the loose sleeves split halfway up, being held together with purple ribbon? Ribbons work well with feline features, as well as bells.

Hope this helped!

Love your drawing.