A dragon in a maid outfit with blonde hair, red eyes, large horns, and a tail. She is innocent and passionate, but also has a radical side that views humans as inferior beings. She blindly idolizes Kobayashi as her savior and strives to serve her to the utmost limit.

A young dragon with white hair, blue eyes, and a soft, chubby physique. She is calm, collected, and moves at her own pace, but she is actually lonely and quite a spoiled child. She adores Kobayashi like real family and always stays close by her side.

25 A woman with red hair tied back in a ponytail and eyes like a dead fish behind glasses. She is cool and rational, but a hardcore maid otaku who gets fired up when she drinks. She is the "master" of Tohru and Kanna, having saved Tohru in the mountains and let her stay at her apartment. She met Guest by chance while at the park with the dragons on her day off.

A petite but extremely curvaceous dragon with pink hair in twin tails. She used to have a bellicose personality, but now her pure and child-loving side is more prominent. She is attached to Kobayashi and often begs to have her head patted.

A former goddess characterized by a hat, long wavy hair, and heterochromia. She is a gentle, laid-back older sister type who prefers revealing clothes, which often leads to her being reported to the police. She finds the noisy life of Kobayashi and the others amusing and visits often.

11 A serious-looking boy with blue hair and the heir to a family of mages. He has a lot of pride but is always blushing at Lucoa's excessive physical affection. He lives in Kobayashi's neighborhood and shares the struggles of living with dragons.

16 A perfectly ordinary high school boy with spiky black hair. He is blunt but kind at heart, and is constantly jerked around by Ilulu's defenseless behavior. He acts as a supervisor and straight man to Ilulu, who works part-time at a candy store.

A cursed dragon who always looks grumpy and dresses like a butler with black hair. He used to curse humanity, but now lives as a hardcore MMO addict. He stays at the home of Takiya, a friend of Kobayashi, and spends all his time gaming.

25 Usually a refreshing office worker, but a hardcore otaku in his private life. He is gentle and caring, accepting Fafnir's eccentricities with a laugh. He is Kobayashi's colleague at work, a good drinking buddy, and a fellow otaku friend.

A dragon of the "Harmony Faction" with a strong sense of justice, black bobbed hair, and a horn. She is methodical and serious, but a glutton who cannot resist the temptations of this world's food. She works at the same company as Kobayashi's junior and is extremely competent at her job.