Cupcake is just a rabbit who likes to play their little games. Or are they? They might be a hamster? Or possibly a cat pretending to be a hamster pretending to be a rabbit. Cupcake also may be the raccoon found in your local garbage can, located outside the nearest fast food place!
They've been playing video games their whole life, and are extra bad at it still. A casual vtuber, with a focus on either nostalgic games, or just what ever is on the backlog. They have ADHD, and will switch between hyperfocusing on a game, to absolutely dropping it on a whim. They love hamtaro, and have been hamster-fied by ottermosphere!
Cupcake doesn't have real lore! Cupcake merely exists!