OVERLORD EPISODE 10: "True Vampire"
rigrit didnt apear in volume 3, the old lady might be the owner of the WC item
but i ways think the lizardmen appear just to show Cocytus. As for the old woman, she appears in the frame, where they show "important" characters.
The old woman´s name is Kaire.
Granted, since they have to stuff only the very important stuff in 20 minutes
What do you think?