Yes.
It can be whatever you desire as long as it:
- Does not contain explicit or offensive words.
- Does not infringe on any copyrights (includes memes).
- Does not contain hate speech.
- Does not advertise a website or service.
- Does not contain personal information (address or phone number).
- Is shorter than 40 characters. If your name is really that long we’ll work something out.
Ultimately, we’ll let you know if it oversteps what we are willing to put in the game.