Hey Mug! How do you think Aang would react if he found out that Toph was the reincarnation of Ummi? How does Koh react?
This is one I haven't really thought much about myself, so I here I am after taking some time to think about it.
I personally think Aang's reaction would be mostly fear but also a mix of joy and catharsis. Slight relief but that would be washed over with the fear and sorrow he'd have from that knowledge. I think being as spiritual as he is, he would be elated to know that Toph was from his past life, confirming the Swamp quote, "… Time is an illusion. And so is death.", so to speak. Aang would genuinely be happy, but he'd be fearful of Koh and what happened to Ummi, trying to protect Toph from repeating a similar fate. He would tell Toph, and of course she would brush it off, but it would be a source of discourse between the two since Toph would feel that she is not Ummi and think Aang is trying to justify being with her. Which would have Aang reassure her and the two work out their relationship and what that means with this new knowledge.
Koh would be privy to this knowledge at some point prior to these two getting together. I think this would happen after the Swamp Episde in book 2 of ATLA. Koh would get bold when Toph and Aang do get together and try to relay his threats to Toph for what Avatar Kuruk did and of Ummi's fate. He'd toture Aang with dreams of Ummi's death and replace her with Toph to mess with him. The spirit will react aggressively and lash out to try and seek revenge on the avatar.
I can just envision a whole story for this ask, but I'm trying to keep it short. I do love the Ummi-Toph theory, but I'm not sure if I'll ever get around to fully using it in my fics (doesn't mean I won't try).
This was a really good ask! Thank you for feeding my inbox Ronin! :)
