Cass is a Vtuber who plays a variety of games but plays League of Legends the most. You can usually find her in her wizard's tower causing mayhem and doing magic.
The story starts when she was a familiar to a powerful wizard. This bunny grew fond of the wizard and their dimension-hopping tower, but alas things were too good and the powerful wizard disappeared. Using the knowledge her master left behind, Cass created her own polymorph potion to turn into a human and continue her master's work in order to hopefully someday find them again. She still has much to learn with her magic as she couldn't get her ears to go away.