Yamaiko

Yamaiko is a member of the guild Ainz Ooal Gown in Overlord, one of the three women among them, and the NPCs of the Great Tomb of Nazarick count her among the Forty-One Supreme Beings. Her avatar is a Nephilim. She created Yuri Alpha, Decrement and Increment, and she is the older sister of another guild member, Akemi. She is described as kind and gentle, polite in the way she speaks and on friendly terms with the rest of the guild, though she tends to act before she has thought a thing through, which earns her the nickname muscle brain sensei. Outside the game she teaches at an elementary school in the arcology, and she says often that children are a treasure to be educated, protected and looked after.