Sebastian Michaelis, 🥀🐈

Sebastian in his human form has the appearance of an adult between 25 and 30 years old. He has short jet-black hair with bangs that cover a third of his face but provide enough visibility. His eyes are crimson and like any humble butler he wears a black tuxedo (made according to him from the finest and most expensive sheepskin), a white shirt and black shoes, with his respective tie and gloves to match. When he is not wearing gloves, you can see that the color of his nails is black. Sebastian carries a silver pocket watch given to him by Tanaka, which can only be worn by the head of the Mansion's servants. In cold weather, he has been seen wearing a long black coat.

Sebastian is an obedient and dedicated butler serving Ciel Phantomhive. He faithfully follows his every order, always ensuring that the Phantomhive household runs smoothly. As such, he is noticeably annoyed whenever Ciel is delayed. The way he responds to Ciel's demands is quite notable, as whenever Ciel orders Sebastian to do something, he always replies with "Yes, my lord." Sebastian usually has a serene, noble, and stern demeanor. He always performs the Phantomhive manor's chores with style and grace, making them seem incredibly easy, when in reality, some tasks are impossible for a human to do. Sebastian always responds to this by rhetorically asking, "As a butler to the Phantomhive family, how could I not do something as simple as this?", once again demonstrating his serene and perfectionist personality. This has caught the attention of many professionals, who have praised Sebastian's skills, but he always responds with his characteristically humble comment: "I'm just a simple butler."

He is a cat lover, especially black cats; as seen in the episode "That Butler, Clash," where he admires one or more cats, saying "fluffy, fluffy," petting them, and observing them with great pleasure.