So, there's some trauma to be relived for sure. The enslavement, the Aurora chair, the getting executed by dispersal (he got better), the 10,000 other Baniks dying and him feeling it ow, so many people he knew dying (some of them got better? One of them they had a spare so it's ok), Zhaan dying (then reappearing here and then DISAPPEARING AGAIN WOE), getting captured by Scarrans for use in yet another science experiment, all the terrible things that happened in PK Wars...
He'd be happy to share his trauma with you! I mean, not happy. Not at all happy. But he's really good at sharing memories.

But also he's a walking nightlight which could be useful. If he's coherent enough to be glowy.