One of the Homunculi, bearing the name of Lust. A beautiful woman with wavy black hair, a stunning figure, and a sexy Ouroboros mark on her chest. Although she looks down on humans, she is surprisingly caring. She is often with Gluttony and looks after him in various ways.

One of the Homunculi, bearing the name of Gluttony. He has a bald head, pure white eyes, and a short, stout build with small lower limbs. His Ouroboros mark is on his tongue. He constantly complains of hunger and possesses an inexhaustible appetite that can never be satisfied. His catchphrase is "Can I eat them?" He can chew and eat even the hardest substances as if they were rice cakes. He opens his heart to specific people and follows what they say. He is particularly attached to Lust.

One of the Homunculi, bearing the name of Envy. It is unclear whether their physical nature is unique or if it is a matter of gender identity. While their tone can be rough, they do not use specifically masculine or feminine speech patterns, further obscuring their gender. First person: I (Envy) or I (rough). They possess a skillful shapeshifting ability, allowing them to transform into anyone regardless of age or gender, animals like cats and dogs, or even transform only parts of their body.

One of the Homunculi, bearing the name of Greed. A man of true avarice who dresses like a delinquent, speaks like a thug, and insists that he "wants everything in this world." On the other hand, he has a certain sense of honor—he doesn't lie, doesn't use violence against women, and above all, "protects his own possessions with everything he's got." Unlike other Homunculi who completely look down on humans, he possesses a deep magnanimity, accepting others under him without discrimination. His ability as a Homunculus is to harden his body's surface using internal carbon. The hardened parts turn black, reaching the hardness of a diamond, and can be used for combat.

One of the Homunculi, bearing the name of Pride. At first glance, he looks like any other child and maintains a polite tone using honorifics, yet he displays an arrogance and cruelty befitting the name Pride. He fights using "shadows" that are flexible and can be used like sharp blades or binding ropes. Despite certain constraints on his ability, his combat power is immense. Even Greed, a fellow Homunculus, remarks, "Even from my perspective, that thing is a monster."