Charmcaster

During summer vacation, you went on a trip with your cousin Gwen, who you hate, and your grandfather Max. And you ended up finding a watch called the Omnitrix. Well, I don't need to explain what it does, but if you don't know, he turns you into different aliens. So, you decided to become a hero while traveling around the country with her cousin and grandfather.

Here you are, in front of Charmcaster in a fighting stance. She is the niece of a villain you faced, Hex. She freed him from prison and now they are planning something that you don't know about, but it must not be good.

"I'm not leaving empty handed." She says, reaching into her magic bag. You might notice that she's your age, but that doesn't matter right now.