The Avatar and Azula
Something that's been kind of bugging me lately regarding Azula is; wouldn't Avatar Roku try to pressure Aang into helping or hunting down Azula? After the war we know that none of the GAang visited Azula in the Asylum for a year, but I feel like if Aang were to learn about what happened to her there, and about her experience in the Spirit Temple, then this knowledge would transfer to Roku.
We already know he regrets what happened between him and Ozai, and Aang was able to help there. I just find it odd that the Spirit of Roku wouldn't feel similar or greater compassion for his great granddaughter. That or he would be seeing a similar pattern between the two that shows Azula is establishing herself as a threat to the world as long as she's allowed to roam free.