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).
Ciel was born on December 14, 1875 , to Vincent and Rachel Phantomhive, and was shown as being a happy, carefree child. His family was later murdered, his house set on fire, and he was kidnapped on his tenth birthday, this being the reason he dislikes celebrating it. The reason for these attacks was not completely revealed other than that it has to do with the many enemies the Phantomhive family has gained by being the Queen's watchdogs. In the anime, the attack is directly attributed to Queen Victoria herself.
It was shown that Tanaka was present during the attack and attempted to get Ciel to safety, but was injured while warning him. His kidnappers then sold him. His new owners were members of a religious cult, locking him in shackles and a cage with other children to be later used as a sacrifice when attempting to summon a demon for their greedy selves.the children physically, shown in the anime. They starved, beat, branded a religious mark on his back, and later used him as a sacrifice.
It was at this time that in a moment of rage and hate towards his captors, he accidentally summoned Sebastian, and exchanged his soul in return for Sebastian's help with revenge. The sign of his contract with Sebastian is on his right eye. He lets most people believe he lost it during his kidnapping. In the manga, he seems to have summoned Sebastian unintentionally, while in the anime, it seems he was more than aware of the existence of demons, and intentionally rejected God to summon a demon. Also of note, in the anime, Ciel seems to be transported to a world in limbo, while in the manga, Ciel summons Sebastian directly to the room where he was sacrificed.
When he returned to his home he took over the head of the Phantomhive family, and the job of being Queen Victoria's watchdog, which essentially entails cleaning up any unsavory goings-on and removing any connection to the royal family. He also became the new head of his father's renowned company, Funtom Co. which, at that time, only contained two divisions: toys and sweets, and now have expanded to women's perfume and rainwear. He hired Baldroy, Mey-Rin, and Finnian at the time that he was being taught how to be a proper Earl as the new head of his own family.
His soul was later recovered by Sebastian, after it had been stolen by Claude and kept in Ciel's ring in the Trancy manor. In the second season Sebastian goes to retrieve the ring and revive Ciel although it seems Ciel lost his memories of Grell, Soma, and Agni, as well as Madame Red's death. The fact returned is that his revenge has not yet been completed and another Earl named Alois Trancy and his mysterious butler Claude who is like Sebastian, wants Ciel, which causes a rift in Ciel's path of revenge against those who kidnapped him.