A dead human crawler whose skin becomes a flesher, mocked by the system for his moisturizing routine.
Derek Reilly appears only as a name in a monster description. After Princess Donut casts You're Not Done Yet, one of the resulting Fleshers scuttles close enough for Carl to examine, and the system identifies it as the skin ripped off a human named Derek Reilly.
The description makes a point of noting Derek was already dead when the skin was removed, then jokes that all the moisturizing he did while alive is much appreciated by the monster his skin has become — and adds that if you are close enough to read this, you too are probably about to appreciate Derek's respectable hygiene. It suggests a hasty exit, which Carl takes.
Nothing survives but his skin, now animate as a level 1 flesher.
Anonymous dead crawler used by the system as the punchline of the flesher entry.