So I was reading an AU story about the trolls if they'd never played Sgrub and it mentions Nepeta's job which involves being under fire (big surprise, it's Alternia), and I realized that I have no idea what she wanted to be when she grew up. Neither her wiki page or her first few intro pages say it. Does anyone actually know/was it ever said in canon?

I don’t think she wanted to be anything.  She probably just wanted to continue her days hunting and rping, living in her cave.