She is an employee of Kouzuka Cleaning, a cleaning shop used by Aozora Police Station, and the name of the shop is apparently "Elegant Cleaning''. She is skilled enough to make even patterned T-shirts pure white. She also has a habit of laughing loudly. She gets along well with Hikari, and is given special permission to pilot the Patvessel. Hikari calls her "Macky". [Edited from Wikipedia]