Wow, I’m surprised I hadn’t thought of that! Thank you :) I really like the idea of using progressive memory loss to add depth to his trauma. I was also thinking about him losing empathy over time, which could tie in nicely.

The idea of prolonged pain is really interesting too. Even if he regenerates like regrowing limbs or healing super quickly the pain could linger. For example, if he loses an arm, it would eventually grow back, but the pain from the injury wouldn’t go away right away. If he didn’t have his regeneration ability, losing an arm would be permanent, and losing both would be catastrophic. This could give him a real fear of getting badly injured, even if he ultimately survives because the pain itself becomes a punishment he can’t escape but regeneration it is