Rei Kakizaki

Rei Kakizaki is a heroic antagonist of The Heart of Martial Art. She is a flight attendant who participates in the Martial Heart.

Read The Heart of Martial Art here

Plot
Rei entered the Martial Heart when her brother was fatally ill, but she was too late as he passed away. She later met Miko Kazuki, who was cleaning a shrine. When she wanted to enter the tournament to make friends, Rei told her that she needed to rely on herself and be more confident to make friends.

At night, she was Aya Iseshima's next opponent when her crush Haruki Honma was kidnapped by agents. Rei recused Haruki and defeated the two men. Then, during her battle, she overpowered Aya but she made a comeback and eventually defeated her.

Rei is later seen in the dark place along with the other contestants that Aya defeated. After Aya made her wish, she presumably went back to a normal life with her brother (who had been revived by the Martial Heart).

Trivia

 * She is the first heroic antagonist of the story, as she didn't befriend Aya or was already her friend like Natsume was.