Characters of Kuroshitsuji season 1

Sebastian Michaelis (セバスチャン ミカエリス Sebasuchan Mikaerisu) is the butler of the Phantomhive household. He is also part of the Noah's Ark Circus, where he goes by the stage name Black (ブラック Burakku). Sebastian often describes himself through the phrase "I am one hell of a butler" (私はあくまで執事ですから watashi wa aku made shitsuji desukara). The phrase plays on the word "demon" (あくま akuma) and the phrase "to the end" (あくまで aku made) which can also mean "I am a demon and a butler." In the Animax dub, he says, "I am a devilishly talented butler."

Earl Ciel Phantomhive (シエル ファントムハイヴ Shieru Fantomuhaivu) is the head of the Phantomhive noble family and the son of Vincent and Rachel Phantomhive. He runs the Funtom Company, which manufactures toys, sweets and food. His birthday is on December 14, 1875. He is also briefly part of the Noah's Ark Circus, where he goes by the stage name Smile (スマイル Sumairu).

Bardroy (バルドロイ Barudoroi), nicknamed Bard for short, is the personal chef to Ciel Phantomhive. His name is Bardroy, nicknamed Baldo, in the American manga.

Mey-Rin (メイリン Meirin), sometimes romanized as Maylene, is the maid of the Phantomhive estate.

Lau (劉 Ryū; Chinese Pinyin: Liú) is a Chinese nobleman and a member of the Shanghai Mafia, leader of an opium den and head of the British branch of a trading company, Kunlun. He is also a friend of the Phantomhive family, as he aids both Ciel Phantomhive and Angelina Durless at various times.

Undertaker (アンダーテイカー Andāteikā) is a nobleman and a funeral director who works with the underworld of Britain and frequently acts as an informant to Ciel Phantomhive. In the anime, he is also a retired, legendary Shinigami officer.

Finnian (フィニアン; Finian), often nicknamed Finni, is the gardener of the Phantomhive estate.

Tanaka (タナカ Tanaka) is the steward of the Phantomhive household and has been working for them at least since Vincent Phantomhive was the head of the house. In the anime, he is also said to hold the position of executive director of Ciel Phantomhive's Funtom Company.