I hope you don't mind that I took slight control of your character. It's just to get into the swing of things. As for the official stranger dude at the ending, he just told Jael that Toku is the Avatar, which is the reason for the weird vibe.
Academically he sucks at Firebending. He barely knows proper stances, forms, moves etc. However, he's skillful when it comes to raw ability and improvisation.
So, I imagine it's pretty likely that Jael's overlooked something. That being, do you think it's that likely that the Avatar is normally allowed to have companions on his journey? If they're supposed to remain neutral, forsaking attachment and worldly possessions, that seems fairly unlikely.
So I imagine that Toku will have to strenuously insist that Jael be allowed to come along. Do you think so? It seems like something worth working in at some point.
I was thinking, since he doesn't know whether he's the Avatar or not, he's lost a sense of who he is, and therefore his inner drive. Like Zuko in the series, when he switches sides to join the Avatar's party.