Chiyako is an elderly woman, first appearing in volume 6, who allows Seimei to stay in her house while he is hiding from his associates and pretending to be dead. She provides all his meals and basic needs. She describes Seimei as "vulgar".
Nakahira also lives in her house, though his relation to Chiyako is not known. Nakahira believes Chiyako and Seimei are similar in their willingness to attack first in a fight.