I feel like there's something about Seth without memories that always gets to me. Now, the thoughts began because of the one dragonwatch book, but I've had more AU ideas and heacannons and such since then. It's just in the fact that Seth is kind to those he is loyal to, and he trusts them more than anything.
In my opinion, he's done so many things out of loyalty, out of trust. He talked to a demon to try and help save the preserve, he killed a revenant to help give his family a chance, and even after someone he was loyal to died (despite the guy not being great), Seth figured out a way to give them a way to win again. He's so loyal and it shows in everything he does and he's so kind because of that. If he's loyal to them, he is kind to them and anyone they trust by extention.
So when he loses his memory, who is he supposed to be kind to? Who is he supposed to trust? If people aren't telling him the truth, then who can he trust? Without trust there can't be loyalty and without loyalty he can't afford kindness. It's like a usually kind, docile animal backed into a corner. What other choice does one have when backed into a corner?
And even if he got his memories back, there's still the lingering feeling of 'I didn't trust you' from before. You would still have the memories of both versions of you, and there is a version of you that did not trust the people in front of you. Why? Why didn't you trust them? Why didn't you believe them? There had to be a reason. Can you be kind? Can you be kind if the very people you were most loyal to, you doubted in your time of need? You needed anyone, anything, and you couldn't trust them. What does that mean for your relationship? How can you ever be so freely kind again?
I don't know. Or maybe it's just 1:16 in the morning and I'm emotional about Seth Sorenson again. (And this isn't just talking about master of the phantom isle, this is talking about any au or idea I or others have had about memory loss Seth) (This is half thought out and I might delete it later)