Chicky's Rival

This is a character I've been developing for a while now, but haven't had anything to show for until tonight. Eric came up with this spiffy design and showed it to me earlier today, so now I finally have a solid visual to base this on. My original name for her is Black Sundae, but we're finding problems with it and working out something else, so for the time being we're just calling her Sundae.
She's Mexican and dressed in a combination of biker wear and Day of the Dead designs. Eric pushed the goth aspects of her so she looks like a member of Wednesday 13, which is perfect for her.

The reason she's Chicky's rival is that when Chicky's mother Leah left the Professor, she took Chicky with her and became part of an all-female motorcycle gang. For a few years they hung together, but one day Leah was challenged for leadership by a fellow member, and in the subsequent bike race the challenger died. She left behind a little girl a few years older than Chicky, and Leah felt obligated to adopt her as her own. Leah felt that their livelihood was becoming too dangerous for little Chicky, and since Sundae had no other family to turn to, Leah made the hard decision of giving custody of Chicky up to the Professor and keeping Sundae. Although Chicky has grown to adore her father in the following years, she always regretted leaving her mother's side, and blames Sundae for it happening; hence, she's her rival. They have crazy street fights everytime they meet.