Kaoru Umemiya

is a member of the Ishiyama High School's Red Tail, a group of strong female students who are entrusted with the protection of Ishiyama High's female students.

Appearance
She is a girl with short purple hair. She wears a standard school uniform and, like Nene Ōmori, she is always seen wearing a white coat. She is also notably the tallest member of the Red Tail.

Personality
She is usually the most silent and reserved member of the group and seems to keep her composure in most situations and is usually the most serious of the group, a trait she shares with fellow Red Tail Ryōko Asuka. Unlike the other Red Tail, she and Ryōko are the only ones to not have befriended the 3 male members of the Tōhōshinki and their subordinates and are still the only ones to hold a negative view on men, however she did show some regret at not having been able to join in on the fun during the War Games incident. Like the rest of the Red Tail, she thinks little of Furuichi, believing him a perverted lolicon.

Return to Ishiyama High School Arc
On their first day back in Ishiyama, Umemiya and the other Red Tail girls meet up at the rooftop of one of the buildings, where it is revealed that Yuka does not really know about the "Killer Six Elements" yet. Umemiya tells her friend that she needs to pay attention to the rumors more often. She then sits out and listens as Nene explain about them more clearly to Yuka.

Later on, a meeting is called at the Kunieda residence regarding the "Killer Six Elements", which Umemiya attends.

Trivia

 * In the anime when she first appeared with the Red Tails on the assault on Ishiyama High to confront Tōjō, her hair is coloured light brown instead of purple.