Lulu Sanjo

Lulu Sanjo (三条 るる Sanjō Ruru), more often referred to as "Baa-chan" ("Granny") by her tenants, is the tough-as-nails and pistol-packing landlady of the Gochiso apartments, which double as a school supply store that she also owns. Impressed by Hibiki Amawa's strong determination, she offers to help him in his mission, helping him disguise himself as a woman and maintain the disguise throughout his time on campus.

Their is also a hint in the Anime series (the last episode) that can be giving us watchers a hint that Baa-Chan can be male. Reason for this is that, Chieko Sannomiya had compared Hibiki to another male that had been at the school and turn out to be the principles lost love, to explain why the principle hates men. To Baa response was that "I don't know, maybe he had been watching you all this time in the shadows" walking away from the principle. The principle turn to Baa and said "there no way it could be(you)....".

Appearance
Baa-chan is a short elderly woman with short greyish purplish hair and dark eyes. She is mostly seen in a red head tie, a pink dress, a long purple and yellow jacket, green strap sandals and a large necklace.

Personality
Regardless of the crisis, “Baa-chan” is always there to save the day. Whether it be helping Hibiki Amawa disguise himself as a woman; preventing Mori and Tofu from succeeding in their missions of perverted espionage; or putting out a fire with her hand-made, automated motorcycle transformer. The character development, although not mind-blowing, is at least present. This is seen through Amawa’s experiences as a disguised teacher and the changing attitudes of the students in his class.