Xero is the most well-known of the three guardians, and is the "face" of Freak-Quency, even in the fake version of the game. She hosts all of the battles, and works closely with Malkav. As of yet, not much is known about her. She seems to be a fairly aloof and laidback girl, with the powers of teleportation. However, when she's hosting a battle, she is incredibly energetic and friendly.

I imagine Xero with a fairly mid-range voice, with a hint of sass to it when speaking normally. When she's presenting, her voice should have a lot more energy to it.