[Why would he ever regret this job, he gets to meet such wonderful people like HITSUGAYA who clearly woke up on the wrong side of the bed today. Or had someone spit in his breakfast. Either way, Aang is determined to win this guy over.

.....After they solve the mystery of the unknown sender.]

I don't really know. [He deflates a little.] They were wearing a dark cloak, with a hood over their head so I didn't really get to see their face.

[oh oh wait--]

But they definitely sounded like a guy! [....] I think.