Haneul was kidnapped, experimented on, and forcibly fused with a spirit by a shadowy government group, and has a great deal of trauma from that. He has great difficulty handling being restrained, is deeply distrusting of many authoritative types (especially military and/or medical personnel), and has a number of identity issues stemming from sharing a body with another consciousness.

He also grew up as the only person he knew capable of perceiving ghosts and spirits, and has some trauma related to that as well, from incidents with the spirits themselves as well as issues related to constantly having to hide his ability. The postcognition did not help matters either, as he had no control over what information he was picking up at the time.

His permission post is here if anyone wants to opt out of dealing with any of that, especially the body-sharing.