- ""Yes, my lord."" 
 - — 
 
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." 
Appearance
Edit
Sebastian takes on the appearance of a tall, young adult male with  red eyes and black hair. He is typically dressed in an outfit consisting  of black trousers, tailcoat, vest, and a tie. He also sports a pocket  watch with chain, and a chained silver lapel pin bearing the Phantomhive  crest, traditionally worn by the house's head butler. White gloves  conceal the mark of his 
Faustian contract with 
Ciel Phantomhive  on his left hand. Occasionally, he removes his white gloves, revealing  black fingernails. When acting as a tutor to his charge, he wears  glasses and a scarf, and sweeps his hair back from his face. 
[1][2][3][4] 
In the anime, when he becomes 
King Edward's and 
Richard's  butler, his hair is much longer, and pulled back by a black ribbon. He  also wears a slightly different outfit with a lacy ascot tie. He serves  them only for a little while, never really being their butler. 
Sebastian's demonic form has never been shown fully. Details including  high-heeled boots, a shower of black feathers, longer fingernails,  glowing irises, slitted pupils, and sharper, longer teeth.
[5][6][7] In the anime, he also has the ability to transform into a crow, although this has never been part of the manga.
[8] 
Personality
Edit
Sebastian is a dutiful and dedicated butler to Ciel. He follows each  order faithfully, while always ensuring that the Phantomhive house runs  smoothly. As such, he is noticeably annoyed whenever they end up behind  schedule. The way he responds to Ciel's demands is quite notable, as the  servants are pleased when they can successfully imitate the way he  says, "Yes, my lord," to Ciel.
[9] 
At times, Sebastian can seem as if he doesn't actually care about Ciel's wellbeing, as he frequently teases him 
[10] and has put his life in mild danger for his own amusement.
[11]  Once, he responded to Ciel's kidnapping as "terrible," but only because  the tea he prepared would go to waste. He also once called Ciel a  "brat" who treats his workers rudely. 
[12]However,  Sebastian shows concern for Ciel even when his life is in no real  danger, often giving him his coat when it's cold outside. He also shows  concern for Ciel when he has an athsma attack and then once again when  he has a panic attack. Agni once comments that he doesn't think  Sebastian is very nice to Ciel, which Sebastian is surprised and worried  to hear. He attempts to 'fawn over' Ciel by feeding him in bed, but  Ciel immediately tells him to stop. Despite all the troubles he goes  through on a daily basis, he has said that he doesn't think it's such a  bad way of life.