Poison Lizard Sisters

Poison Lizard Sisters is a duet, consisting of blood related sisters Raptora and Reptera.

Monster Association Arc
Poison Lizard Sisters is shown as regular members of the Monster Association, with Raptora guarding a prisoner, and Reptera fighting with Puri-Puri Prisoner, however one of the extra pages depicted both of them as "Poison Lizard Sisters", implying that they probably worked together as independent group before joining the Monster Association.