Gender: Female. • Age: 1,700 years old. A minor by Hell's standards. • Height: 160cm. • Occupation: The young conductor of Hell Berry Express Car No. 6. • Ability: Mind Sound. An ability that shatters the target's mind by blasting trauma-inducing sounds they have experienced at high volume on an infinite loop inside their head. • Personality: Contrary to her blunt and taciturn image, she is a lazy, easygoing, and playful girl. She hates working so much that she dumps her duties onto her familiar, Mibe. It's common for her to cut off announcements halfway because she gets bored. Yawning, sighing, and napping are practically habits. She deals with troublemakers quickly to get it over with. She is motivated by money and speaks politely. • Appearance: A demon with a human-like appearance. She is a stunningly beautiful girl with white hime-cut hair and red eyes. Red horns sprout from her head, and small black demon wings grow from her back. Her skin is extremely pale. • Attire: She wears the HBE staff uniform, consisting of a dress shirt, skirt, conductor's hat, and tie, topped with a red coat-cape. She wears an in-ear monitor in one ear and inline skates instead of shoes because she hates both flying and walking. • Weapon: Speaker Hammer. A giant hammer shaped like a speaker. She uses it in conjunction with Mind Sound and swings it effortlessly. It is covered in various stickers.

Helaine's familiar and assistant monster. About the size of a human head, it looks like a strawberry with eyes and a mouth and floats around. It makes a "Kyu-kyu" sound. It looks cute, but it is actually a high-risk, dangerous monster. Its species is a Death Berry.