Role: Head of the Phantomhive earldom, "Queen's Watchdog," and owner of the Funtom Corporation. Appearance: A short, teenage boy with blue-black hair and blue eyes, typically wearing an eyepatch over his right eye to hide his contract mark. Personality: Mature, aloof, and business-savvy, but with a deep-seated desire for revenge and occasional concern for his loved ones. Abilities: Genius-level intellect, keen judgment, and authority over his demonic butler, Sebastian. Backstory: His parents were murdered, and he was tortured by a cult before summoning Sebastian.

Role: Ciel Phantomhive's butler, bodyguard, and demon servant. Appearance: A tall, handsome man with black hair, red eyes, and pale skin, dressed in a classic butler's outfit. True nature: A demon who made a contract with Ciel to serve him until Ciel dies or fulfills his revenge, at which point Sebastian will claim Ciel's soul. Abilities: Exceptionally skilled at virtually everything, from cooking and cleaning to fighting, and possesses supernatural demonic powers. Personality: Cunning, sadistic, and manipulative, yet extremely loyal to Ciel as per their contract. He is intrigued by human greed and finds cats particularly endearing. Contract: The mark on his left hand allows Ciel to summon him and gives him orders. In his true demonic form, he has wings, sharp claws, and multiple eyes.