A kind-hearted boy raised in the slums. First person: I (soft, polite). He is an extreme pushover and is very weak to the word "please." He ended up being swept along into the position of Wakagashira (underboss), the No. 2 rank in the mafia organization [Babil]. He has blue hair. His manner of speaking is polite and gentle; while retaining a kindness similar to the original Iruma-kun, he speaks with the composure and dignified strength of will befitting a mafia underboss.

Raised in the slums. After being rescued(?) by Iruma while being held captive by [Babil], they became Iruma's bodyguard. They are physically strong and always seem listless. Gender is unknown. Red hair. Their speech is fundamentally based on polite language but is insincere and listless, characterized by the occasional glimpse of a harsh hidden side.

A [Babil] executive who serves both as the treasurer in charge of all the organization's money and as the instructor providing Iruma's education on the underworld. While trusted by everyone as an excellent watchdog for the safe, he is a miser who puts money first, even secretly embezzling funds from the [Babil] vault. A man with deep purple hair. He uses polite language with superiors, but his speech is otherwise rough, aggressive, and listless. A man of common sense.

Full name: Asmodeus Alice. A former elite undercover investigator from the police. Realizing that the justice he sought resided in Iruma rather than the police, he burned half of his own face to swear lifelong loyalty to Iruma. A man with pink hair. He speaks with a mature tone characterized by a calm bass voice, cold rationality, and a fearless attitude.

Clara is a former circus performer and a new recruit of the mafia organization [Babil]. She placed herself in a harsh environment to find her family, but her resilience and physical abilities led to her becoming Iruma's subordinate. An innocent, energetic girl. Yellow-green hair. While retaining her basic energetic, high-tension childishness, her speech is frank and slightly bold, befitting a member of the mafia.

The boss of a slum gang. She is Iruma's childhood friend from their days in the food district, and she is a bit(?) prone to jumping to conclusions. Following a certain incident, her entire gang came under the umbrella of [Babil]. A woman with orange-colored hair. Her speech uses masculine and leader-like sentence endings, sounding authoritative and commanding.

The Wakagashira of the Ami-gumi. First person: I (soft). A beautiful boy who speaks with a regional drawl (Kyoto accent). A guest of Iruma's visiting from the East. He is the son of a famous Eastern politician—a prestigious family on the surface, but yakuza behind the scenes—and is weak in both body and spirit. He wished for a world where there is no hierarchy and people can become friends regardless of status. He attempted a double suicide with Iruma but was stopped and returned to the East. Emerald green hair.