Chiaki is one of three maids staffing the Hadou Financial Group under Ruri Hadou. Her duties encompass managing Ruri's personal affairs and providing operational support during emergencies. She works within a dedicated technical team alongside Makoto and Sonia, operating from an underground command center to coordinate repairs and logistical assistance for the mechanized unit Demonbane during its combat operations against the Black Lodge.

She possesses brown eyes and brown hair worn in a ponytail featuring cheek curls, spiky bangs, and a ribbon hair tie. Her consistent attire is a standard maid uniform complete with a headdress, fingerless gloves, and ribbon accents, always accessorized with glasses.

During investigations into supernatural disturbances like the Innsmouth events, Chiaki contributes valuable situational observations, including identifying physical traits indicative of Deep One hybrids. Her role remains consistently operational and supportive throughout the series.