Interesting thread,
in my game table Conchobar had a starring role as an NPC. He wasn't as important as Sandara, as she was a love interest and helpful ally, or Crimson with his characteristic accent, or the great Kroop. But yes, he was a victim.
He was in love with a girl who didn't love him back
He wasn't well suited for life in the Wormwood
He got better at doing his job but then he got captured by the grindylows and lost and arm and leg
After such traumatic event, given that my PCs rescued him and Sandara from the cave, my group's witch (who kinda acts like a cleric) had to spend some off-time hours tending to his wounds and his PTSD of sorts. PCs and NPCs retired after TWWMutiny and I guess Conchobhar would have called it quits as well, but given that I had fewer players and NPCs who were relevant, I had to assume he was compromised and felt in debt to the PCs and for that reason he'd stay.
He's currently wearing a mask and he's got way more eccentric. Living in "the Revenge's" crows nest