Sekijiro Kan, the pro hero Vlad King, teaches biology and serves as homeroom teacher for Class 1-B at U.A. High School, later advancing to Class 3-B. Standing 194 cm tall with a bulky muscular build, he has lightly tanned skin, short pale gray hair spiked upward with one clump draping his forehead, visible scars on his left cheek and neck, sharp lower canines, and small thin eyes. His hero costume features a dark red skin-tight suit with a low U-collar, white over-the-knee boots, red gloves, wired vambraces, a three-piece metallic belt, and an orange eye mask. Stern yet deeply caring, Sekijiro prioritizes student safety and growth, fostering rivalry between Classes 1-B and 1-A to motivate progress—occasionally with comically biased commentary during competitions. He holds monthly parent-teacher conferences, offers personal crisis support like relationship advice, and acts as a father figure beyond his classroom. His teaching blends authority with relatability, rewarding achievements with gold stars. Throughout his career, he expelled only five students. He harbors regret for not aiding All Might more during the latter's tenure as Symbol of Peace and shows concern for colleagues during public crises. His Quirk, Blood Control, allows him to eject and manipulate his blood via a specialized gauntlet, creating restraints or barriers before reabsorption. It grants resistance to lethal blood loss. He demonstrated this by immobilizing a Dabi clone within seconds. Combat-wise, he possesses enhanced strength—cracking walls while pinning foes—and enhanced speed for rapid threat response. Official stats rank his power, speed, and technique highly (4/5–5/6), intelligence and cooperativity moderately (3/5–3/6), and "Love For His Students" maximally (5/6). Born in Aomori Prefecture as the youngest of four sons, Sekijiro inherited his Quirk despite his mother's hemophobia complicating childhood injuries. After failing U.A.'s entrance exam, he entered general education but transferred to the hero course via the Sports Festival. Academically intense, he prioritized training over socializing. An X-shaped scar stems from a kitchen accident during an early-hero-career emergency call. Personal quirks include clumsiness, cat allergies, and owning an English bulldog named "Bull," affectionately nicknamed "Fart Factory" or "Piggy." Married to police officer Sumika Kan, they reside at U.A.'s faculty dorms with five children: daughters Akako (hero alias Crimson Puppet), Akane (Ichor), and Akari, plus twin sons Uni and Niu. The twins resulted from IVF after miscarriages and a stillbirth. Uni shares Akane’s Quirk and protects Niu, who inherited Sekijiro’s Quirk and overcame infant respiratory issues. Sekijiro supports their heroic aspirations, visiting Akako and Akane in their dorms and letting his nephew spar with students to showcase non-flashy Quirks. He enjoys spoiling nieces and nephews with pro-hero meetings. He maintains a friendly rivalry with Shōta Aizawa, rooted in mutual respect, and a long-term friendship with Hound Dog. Outside heroics, he vents frustrations to his dog and reluctantly wears reading glasses. His name’s kanji translates to "vessel," "red," and "love," aligning with his Quirk and compassion, while "Kan" means "blood" in Turkish.