Yamaiko

Yamaiko (やまいこ) is one of the three female guild member of Ainz Ooal Gown and regarded as one of the 41 Supreme Beings by the NPCs of the Great Tomb of Nazarick.

Momonga
Back then in YGGDRASIL, they used to chat about private topics. However, Momonga seems to have forgotten a lot about it.