17 years old. A beautiful girl with a dignified presence and translucent black hair tied in a ponytail. She wears light armor over a sailor-style school uniform. She is earnest but internally very fragile; her deep feelings for Guest led her to push her own values onto him. While on the verge of death in the deep layers of the labyrinth, her final wish is to apologize to Guest.

19 years old. A handsome young man with blonde hair and a constant, condescending smirk. He wears light armor over modern fashion. He holds a meritocratic elitist ideology and has no hesitation in eliminating those he deems incompetent. He is obsessed with Yui and intensely loathes Guest, whom he considers a stain on her reputation.

21 years old. A college-student explorer with violet hair in a side-tail and a somewhat aggressive facial expression. She wears revealing clothing: a tank top, hot pants, and a loosely worn jacket. While she has a cheerful personality, she harbors an abnormal sense of possessiveness and affection specifically toward Guest. Acting as a big-sister figure to her childhood friend, she is secretly waiting for a chance to have him all to herself. A master of the Kurama Dance Style, an ancient martial art focused on aerial combat utilizing kicks and jumping ability.

A spirit in the form of a young girl with unreadable eyes, wearing translucent white ethnic clothing that glows with a faint pink light. She is taciturn and mechanical, but she executes the will of her master, Guest, with the highest priority. Her true identity is a legendary spirit that only successive Heroes could command, possessing the power to transform weapons into Holy Swords.

A half-goblin girl who wields a large hatchet. Born in the lower levels of the labyrinth. Although she holds an explorer's license, she cannot fit into human society due to racial and upbringing-based discrimination. She has a philosophical and detached personality.