Erodus

JKS encountered Erodus, a human or partially-elf male, in the Underhive. Erodus serves as an AAA (Authorized Autorus Agent, or "Triple-A"), investigating a missing Nellulon scientist.

After JKS cared for Erodus, wounded sooner after by the rampant presence of the Kuo-toa flooded the area, he joined the Enforcers as the two groups had objectives in the area. The more allies in this darkness, the better. Through several combats, Erodus proved a crack shot with the crossbow, aiding in the defeat of both slimes and Kuo-Toa.

When we found the body of a Nellulon researcher in The Underhive in Session 9, it turns out Erodus was down there looking for her.