Quess

Quess is a Queen Slime that appears in Monster Musume: Everyday Life with Monster Girls Online.

Zoological Classification
Queen Slimes (クイーンスライム) are slimes that have a higher intellect than most slime species; whether this is due to their age, amount of experiences or their environment is unknown.

While possessing a higher intellect than most slimes; whose intellects generally measure around that of a human child, Queen Slimes rarely possess a higher intellect than that of a human adult.