Tanaka is the house steward and former head butler of the Phantomhive household. He is an elderly man with gray hair, a mustache, and a monocle, typically dressed in a black suit and white gloves, and he is almost always seen holding a cup of tea. He served as the loyal butler to Vincent Phantomhive, Ciel's father, and continued in the household after the attack that killed the earl's parents. During that attack, Tanaka was stabbed in the back but miraculously survived. He later assumed the title of steward, leaving the daily butler duties to Sebastian Michaelis. Tanaka rarely performs active work around the estate, often appearing in a comically smaller, simplified form while quietly sipping tea, but he is a highly skilled servant who can take on a full-sized appearance when necessary. He is deeply loyal and kind toward Ciel and is known to be strict when it comes to his duties. At the request of Vincent, Tanaka keeps a journal documenting events before and after the tragedy, suggesting a careful and observant nature. His past may include experience as a samurai in Japan, hinted at by his excellent swordsmanship and his calm, watchful demeanor. He shares a long history with the Phantomhive family, having known Ciel since childhood, and maintains respectful relationships with the other servants. His presence in the story serves as a quiet, steady link to the former era of the household, and his survival of the attack and continued service show his enduring devotion. Despite his limited physical activity, Tanaka is capable and reliable in moments of emergency.