Voiced by: Masaya Matsukaze (anime),Junichi Suwabe (drama CDs), J. Michael Tatum (English)
Kyouya Ootori, a second year student at Ouran Gakuen, is the sly and calculating vice-president of the Host Club founded by his best friend and polar opposite, Tamaki Suoh. Despite Tamaki being president, Kyouya truly runs the club and plays the role of a puppet-master behind the scenes, earning him the nickname “Shadow King”. He takes care of the Host Club’s expenses and will even sell items belonging to the host club members (such as Haruhi’s pencil) for profit. In his words, “use whatever is at hand, be it friend or foe.” Almost everything he does is for his own benefit, but he can occasionally display a selfless side. He is the third son of his very wealthy and influential family; thus, if he wants to take over his family's business, he must work extremely hard to meet his strict father’s high expectations. Also, Kyouya's bad temper when waking up in the morning has earned him the name “Low blood pressure Evil Lord”.
Kyoya is best friends with Tamaki, despite their completely different demeanors. Tamaki tends to call him "Mommy", or "Mother", in reference to Tamaki calling himself "Daddy". Kyoya is secretive and intelligent, being able to calculate any benefits that would come out of the Host Club's misadventures. Despite having quite antagonistic traits, the Host Club wouldn't be as half as successful without Kyoya's uptight resourcefulness. Although he doesn't put an act for the women, he is considered the "cool type." He lives with his father, an affluent zaibatsu owner specializing in hospital management, two brothers that he has to surpass to become his father's successor, and an older sister who deeply cares about him. Although he comes off as cold and uncaring, there have been instances in both the anime and the manga wherein he shows concern for others. One instance was when the Host Club went to the beach, and he pretended to be 'the bad guy' just so that he could show Haruhi how worried she made everyone. Another was when he helped an old lady who was about to pay a large amount of money for a fake item.