also I say that Lucent doesn't do guilt/shame/regret but I think they might actually just manifest differently for him
he fucked up when treating a patient and it might cost them their life. his mentor did horrific things and he might have unwittingly assisted in that research. it sucks, but he did his best with the knowledge he had at the time. regrets won't help. hating himself won't help. the river of knowledge only flows forward.
he just... needs to take responsibility. needs to do better, be better, so he can fix his fuckups, so he can fix his mentor's fuckups, so he can keep these fuckups from happening again, so he can make it all better. he knows he can do this, he knows. he's smart, skilled, and capable, so he just needs to keep going forward. as long as he can keep going forward, he's fine. he's fine he's fine he's fine--
(Savoulain, taking one of Lucent's wildly gesturing hands in his. pulling him into a hug. making him some soothing herbal tea. reminding him to sleep. tomorrow, they can talk about this. tomorrow.)