Kiyomi Watase is a supporting character in the anime. She serves as a steadfast advisor and meticulous maid to Oryou Sakamoto, who is the president of the Mobile Shinsengumi. In this capacity, Kiyomi is responsible for balancing administrative oversight with hands-on support to uphold the group's leadership and maintain operational efficiency. Her role is defined by ensuring seamless coordination of tasks critical to the organization's functioning, prioritizing structural order and executive support for the president.

In terms of personal description, Kiyomi has brown hair and brown eyes. Her demeanor is a blend of professionalism and approachability, which is reflected in her practical yet personable design. Her skills extend beyond standard secretarial duties; she possesses a dual expertise that includes nursing, integrating medical caregiving into her responsibilities for the Mobile Shinsengumi.