Ebana appears to be Kakura coach’s nephew who was suspended for fighting on the day of the entrance ceremony. He was forced into his uncle’s dojo by his father for Kakura to teach him discipline. However Ebana got into fights with the other members of the dojo and eventually stopped coming to practice.
While in middle school he fought an opposing competitor to protect a teammate and got the club suspended from competing. When asked by the third-years, his fellow first years threw him under the bus to take the blame resulting in his withdrawal from the club and from kendo. Eventually, he accepts Hiroto as a rival (in kendo and in love) and joins the Ouka High Kendo Club.