Chiaki Tanimura

is a member of the Red Tails who can use four guns simultaneously.

Appearance
Chiaki is a slim, petite girl with short black hair and a small bust whose expression is often a deadpan. She wears the Ishiyama High School uniform and her skirt ends above the knee, but beneath it are remodeled airsoft guns strapped to her thighs.

Personality
She doesn't speak much, often using hand gestures to express her meaning. Despite her standard expression and tendency to shoot first, ask questions later, she appears to have more of a feminine side than many of her fellow Red Tails.

Ishiyama High
Chiaki is first introduced along with fellow Red Tails Aoi and Nene following the girls' return to school. While walking the hallways, a boy dives to the floor in an attempt to see her panties and she shoots at him until Aoi recommends she stop. She and Nene go to confront Oga soon after about his previous encounter with Aoi, and when they end up badly injured in the infirmary, the incident is blamed on him. In fact, they were beaten up by the MK5 in order to force Oga and Aoi to have a serious fight. Later, she and Nene encounter Furuichi and Oga at a swimming pool, where Furuichi's former upperclassmen unsuccessfully flirt with them.

When the vast majority of the Ishiyama student body challenges Oga to prevent him from reaching Tōjō, Chiaki is among the Red Tails who intervene.