Lamia

Lamia is a demon doctor who is very small. Her name is possibly an allusion to the mythological demon. She initially provides her services as a nurse (assistant doctor) when healing Tatsumi.

Lamia is a Demon like Hilda. Her mother is general Laymia of the 34th Pillar Squad.

Later in the series, she seeks Takayuki's help to find Lord En on Hilda's request. Furuichi suspects her of being tsundere. His sister Honoka in turn almost reports him to the police when she suspects him of being a lolicon.

Appearance
Her age is unspecified, but her appearance is that of a pre-teen girl. . Lamia has pink hair, green eyes and is wearing white-blue striped stockings together with her medical suit. Lamia is actually considered quite cute.

Equipment
Lamia carries a pistol loaded with bullets containing demonic concoctions that can erase memories, force a person to do one's bidding or, in the case of Oga, trap him in a psychic loop. She is always accompanied by two small Muumuu pets, one of which sits atop her head and often mimics her mood.

Personality
Lamia's personality is that of a bratty child, as she often acts violent towards the likes of Furuichi. She's been called a 'tsundere' by him. Like her boss, she can read minds, even baby Beel's, although she does not do it very often. She disapproves of Oga as Beel's parent, but reluctantly accepts it after his battle with Toujou. Although she seemed cold and hostile upon their first encounter, she thanks Oga for saving her after the incident in the demon world. She is very protective of Baby Beel and greatly respects Hilda, whom she refers to as "Hilda-nee-san."

Plot
She is first Introduced after Oga's first fight with Toujo as the Dr. Rachmaninorr's assistant who's going to help Be'el to get healthy again. Lamia returns to the human world to take care of Oga's wounds after his confrontation with Hecados and the other demons.

Hilda
Lamia has a great amount of respect for Hilda. Commenting on how beautiful Hilda is and called her as a breast idol because of the size her breasts are. she also refers to Hilda as "Hilda-nee-san/sama."

Beelzebub
Lamia has great confidence in Beelzebub, as she is seen crying and wishing him good luck when she is returning to the Demon World.

Takayuki Furuichi
Furuichi and Lamia have a bit of a close relationship. In the beginning, they were just acquaintances, but after playing along with the game along with Yuka Hanazawa, Chiaki Tanimura, Nene Ōmori, Tatsuya Himekawa, Shintarō Natsume, Takeshi Shiroyama and Hajime Kanzaki their relationship grew. (Though Furuichi calls himself a lolicon while walking around with Lamia due to her child-like appearance). In Chapter 101, Lamia was seen hugging Furuichi when they won the game. En, who likes Lamia, seems to be jealous of Furuichi at times, because they are close when he sees them. Because of their closeness and various misunderstadings everybody in the Red Tails started to accuse them of being in a relationship and label Furiuchi a pedophile.

En
Lamia claims she is not very good at "dealing with him" because every time she is near him, he gets shy and territorial about her, which greatly annoys her. In chapter 103, En says that Lamia is "his wife".