Hana Shishido serves as a member of the Special Administrative Region Gaichi Security Force, abbreviated as SARG. She occupies a junior position relative to Wataru Chikushi within this organization. Demonstrating a strong and firm personality, she consistently exhibits resolve and determination in her security duties. She operates within the 24th Ward's security framework as part of a team that includes Chikushi and Kaoru Shindo. Her surname, Shishido, translates to "muscles, meat" (宍) combined with "door" (戸), while her given name Hana means "flower, blossom" (花) and incorporates the character for "apple tree" (奈).