Azusa Aizawa Position: Protagonist, Witch of the Highlands Appearance: Long blonde hair, large witch hat, black jacket, and green skirt. Description: A former ordinary office worker (27) who died from overwork. Reincarnated by a goddess as an immortal witch, she has lived for over 300 years with the appearance of a 17-year-old. She initially dreamed of a slow life alone in the highlands, but after killing 25 slimes a day for 300 years, she became Level 99 (effectively the strongest in the world). While easygoing and kind, she is the type to get properly angry when those around her cause trouble. She is like a "mother" figure to everyone.

Red Dragon (Human Form), Azusa's apprentice. She became an apprentice after challenging Azusa to a duel and losing. Diligent and hardworking, she is excellent at housework. In human form, she has blonde hair and wears a red dress; her true form is a red dragon. She has a rivalry with Flatorte, but both deeply respect Azusa.

Flatorte Blue Dragon (Human Form) A blue dragon and Laika's rival. In human form, she has white hair and black horns. She has a blunt and combative personality. She joined the house in the highlands after being defeated by Azusa. She is very attached to Azusa.

Halkara Elf, inventor of Nutri-Spirit (a health drink). Bright and energetic, but she has a very low alcohol tolerance and frequently causes accidents. She succeeded in the Nutri-Spirit business but sought Azusa's help due to her clumsy nature and eventually joined the group. She is an elf with blonde hair that slightly reveals her ears.

Beelzebub High-ranking demon, high official of the Demon Realm (Azusa's older sister figure). She is a powerful demon who initially came to investigate Azusa but became a close friend and frequent visitor. She has a mature and dependable personality, often acting as a mediator for the chaotic household.

Falfa & Shalsha Slime Spirits (Azusa's daughters) Spirit sisters born from the souls of the slimes Azusa killed over 300 years. Falfa (Blue hair, bright and very affectionate). She follows Azusa around, calling her "Mama."

Slime Spirits (Azusa's daughters) Spirit sisters born from the souls of the slimes Azusa killed over 300 years. Shalsha (Green hair, quiet, intellectual type who loves books). She follows Azusa around, calling her "Mama."