Three possibilities come to mind, Wiley being the best match. These guys have already met their fate, even a bit mention, will extent their time.
A foodseller, something of a restaurant entrepreneur. Trapper, She was a large wild caught (traveled and adventurous as she was found in a crab trap) female and roamed the tank until it was time to lay eggs then she settled down and tended her very small clutch of young. She lived 11 weeks beyond the hatching so was good sturdy type. Unfortunately, changing the name to something feminine would be difficult.
A few street entertainers from the poor downtown district A shoe-in for Wiley, assuming these street entertainers can appear and disappear as the local constablatory might move them along but has the wit to live a full life in impoverished conditions. I would report him assumed dead, over and over, just to catch a glimpse of him the next day. So much so that I thought about reporting him missing on a daily basis
. The tank did not get fed much during parts of his absence but he survived on whatever he found in the LR. Then one day, for no obvious reason (after another assumed dead post) he came to the front of the tank and
allowed himself to be caught (perhaps all the small live food was consumed). He lived out the rest of his life in a smaller tank where he could be fed daily and survived a normal life span.
Brother of a Senator Would be fitting for Dusa (originally Madusa). He matured late physically and I had high hopes he was female (as did his tankmate brother, Sisturus at one point). He would follow Sisty's lead when he noted Sisty was rewarded but never initiated activity himself. He outlived Sisturus.
Sadly my favorite merc, Sisturus has no role in this one, maybe another, particularly if you invent a Shaman or witch doctor. His name came from the scientific name for a pygmy rattlesnake. He was definitely a charmer.