Stareater Hm.. physically her design is striking, and totally in my punk/emo/gothic tastes. 

I would make her a confident character, who will punch her way through life. I think I would put her in Megumi's gang, as the second in command. A feisty frank girl who won't stop when told "it's impossible". I imagine her quite easily becoming a friend of Megumi, and associating with her roommates, Annaël and Emi. But behind that cocky facade, I think she hides a more emotional side, someone who already knows what it is to lost someone dear and doesn't want to repeat the experience. Perhaps a bit cold at first side, and not the sharing stuff type, but once someone got past her barrier, it's for life. I won't give her a name yet, because once I do I become wayy too much attached to the character ( that's like the open door to my emotions, between I and my characters xD ) since I'm very careful with how I name them.

The world I have in mind for her is similar to our own, at the exception that there is many more humanoid creatures than in ours ( and magic as well! ). Megumi, Annaël and Emi lives in Tokyo city center, so she will be around the big city as well. Sadly I don't have much drawn at present for this world, as I created it very recently ( to be honest, the whole thing begin when I got Annaël, one or two months ago if I remember correctly. He needs two close friends, in a thread I got Megumi and loved her design at first sight. Then I created Emi ( who isn't on Toyhouse yet ) to join them in the flat. After this, when writing Megumi's backstory I had a gang to create, and if the previous leader is already designed ( Nao, not in Toyhouse yet ), the rest of the gang is still a work in progress and an open wide door for new characters. 

I'm slow to add art to my character, as well as a solid backstory, but I don't easily let them go as well. I love them all dearly, and I haven't yet gotten tired of any design I own or created. So I'm pretty solid in this regard, if you're worried about an unloved character.