Can I Change My Username?

No. The username you register with is permanent, so pick it with a little care: it is how other players see you in chat, on battles, and in the rain.

One exception: if you signed up with Google, BloxCash suggests a username on your first visit and offers a single chance to change it right then. Once you confirm it, or dismiss the prompt and come back later, the name is fixed.

If the name is fixed, the face is not: see Changing Your Avatar. And if your worry is privacy rather than style, the private profile toggle in Settings hides your stats and activity from other players.