Who is Joel sister?

It seems like you're asking about "Joel Sister". There isn't a widely known public figure or celebrity by that name. It's possible you're thinking of:

* The Jonas Brothers: They are a popular pop band with three brothers: Kevin, Nick, and Joe Jonas. Perhaps you're thinking of one of them, but the name is slightly off?

* A local figure or someone you know personally: It's also possible that "Joel Sister" is a nickname for someone you know from your community or personal life.

Could you please provide more context or details about what you are looking for? This would help me figure out who you might be asking about. 😊