Hijikata X-ko is a comedic, gender-swapped version of Hijikata Toushirou from the anime series Gintama. She appears due to a gender-bending storyline caused by a mysterious virus, transforming male characters into female versions. X-ko retains Hijikata's strict, mayonnaise-loving personality but is depicted with exaggerated feminine traits for humorous effect. Her presence parodies both gender tropes and the original character’s serious demeanor, providing fans with a unique and lighthearted twist on the Shinsengumi vice-commander.