Hatsuka Suzushiro presents an androgynous appearance, identifying as male while possessing a slender build, feminine hips, and shoulder-length black hair styled in an undercut with blunt bangs. He favors feminine clothing like dresses and coats, convinced this style suits him best and attracts potential romantic partners across all genders, furthering his goal of producing vampire offspring. His footwear typically consists of dark calf-length boots or slippers at home, occasionally extending to costumes like a maid outfit for events. His demeanor is typically laid-back, intelligent, and perceptive, often anticipating others' thoughts while maintaining emotional distance. He notably refrains from using supernatural charm on Ko Yamori initially, offering pragmatic advice instead. However, he exhibits a darker, authoritative side toward his human servants, demanding strict obedience and punishing disobedience. He treats these servants as "living furniture" within his sparsely furnished apartment and advocates for brainwashing humans into dependency as his form of love. This carefree nature shifts when excited, such as assisting Nazuna Nanakusa with romantic strategies, or when flustered by direct compliments about his appearance. As a vampire, Hatsuka possesses standard abilities including immortality, superhuman strength, speed, durability, levitation, phasing through objects, accelerated regeneration, and supernatural charm. He maintains alliances with fellow vampires Seri Kikiyou, Kabura Honda, Nico Hirata, and Midori Kohakobe. He manages several human servants, including Kurihara and two unnamed females, who address him with deference. He expresses specific curiosity about Ko Yamori's blood and offers to turn him into a vampire offspring, an offer Ko declines. Background details remain sparse. A brief flashback hints at past experiences with gender expression, depicting an unidentified figure in a female school uniform. His name derives from "suzushiro," an archaic term for daikon radish, reflecting the series' theme of spring herbs. No significant development or expanded backstory occurs in official media, including the main series and spin-offs.