The 4th season, set in a boarding school, starts airing as a spring 2024 anime!

●Sebastian Michaelis x Ciel Phantomhive

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“The story begins when Ciel Phantomhive, who was almost sacrificed after being delivered to a devil-worshipping cult by someone who killed his parents, forms a contract with the demon Sebastian Michaelis. While keeping Sebastian as his butler, Ciel takes over his father's duties assigned by the Queen of England, with the goal of finding out who killed his parents.”

“And so, Ciel and Sebastian solve various incidents that occur in England...... The difference in their personalities is interesting! Ciel has a cheeky personality appropriate for his age, but he is a genius with the brains and ability to match. On the other hand, Sebastian, being a demon different from humans, behaves politely but also shows insolent courtesy towards his master, Ciel. The way these two solve cases is fascinating! In season 4, Ciel infiltrates a boarding school as a student, and Sebastian as a teacher! The gap in their usual relationship is interesting and a highlight to watch!”

●Agni x Soma Asman Kadar

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“These two are introduced during an incident at the beginning of the story, being the 26th prince of the Bengal princely state and his butler. Agni has a free-spirited personality befitting a prince, while Soma exhibits the perfect butler persona, swearing absolute loyalty to Agni!”

“The relationship between this master and butler seems similar to that of Ciel and Sebastian, but these two are characterized by their absolute trust in each other. Soma was once terribly unruly, but Agni saved him just before he was to be punished, and since then, he has wanted to repay him with all he has, even if it means using his overwhelming physical abilities or making ruthless decisions.”

“Soma's loyalty and Agni's demeanor as a butler were so exemplary that Sebastian himself called it a 'model of butlerhood.' They met Ciel and the others at the beginning of the story and were supposed to have no more appearances...... at least that was the intention......”

●Claude Faustus x Alois Trancy

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“These two characters do not appear in the manga and are extremely important in the original story aired in the second season of the anime.”

“Without going into too much detail, as it would spoil the second season of the anime, these two are essentially 'Ciel and Sebastian with different circumstances.' After various events led him to become an orphan, Alois successfully summons the demon Claude to serve as his butler. The oppressed Alois escapes poverty upon meeting Claude and takes on the task of “cleaning up incidents” that the Trancy family has traditionally handled (the aftermath of incidents resolved by the Phantomhive family).”

“Both serve under covert orders from the Queen of England and employ demons as their butlers. Their meeting...... that's the story of the anime's second season! So, you won't meet Alois and Claude unless you watch the second season of the anime!”

●William T. Spears x Grell Sutcliff

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“Now, in this work called Black Butler (Kuroshitsuji), since there are demons...... there are also reapers! This duo, William and Grell, have the role of managing the souls of the dead as reapers!”

“William is a reaper so serious that he's inflexible, and Grell is a reaper with a psychotic and free-spirited personality. In the anime, their meeting and the beginning of their relationship are depicted in a side story...... Though their personalities don't match, they are sometimes portrayed as a well-coordinated duo!”

“As friends and colleagues for over 90 years, this duo has solved various incidents...... Their opposite personalities make them an attractive and interesting pair to watch! They have a unique position, so their appearances are somewhat limited, but they do make a few appearances in season 3, so be sure to check it out!”