Team Super-Happy-Fun-Fun (aka Super-Fun-Squad, Fun-Happy, Whatever)
Needle came from a much more vicious environment not unlike real-world nature itself. She's quite uncivilized and has a bad habit of instinctively attacking others. That and with no care for personal property, she's taken many a confectionery for herself, is notably tubby as a result. Likely has ancestry from Caerbannog. More suited to fighting like a tank, Needle's definitely the brawn of the two.
Happa is pretty harmless yet somehow draws the most ire, possibly for her sunny attitude, being an avid reader or just for the heinous crime of being short-sighted and thus needing glasses, she's almost blind without them. As much as she tries to avoid offending others, she isn't really good at completely ignoring the faults of others. She may have had her specs stolen but that doesn't stop her from retaining libraries worth of trivia and information.
Well that's a general idea of the two.