First appearance: Battle 66

Age: 17

Type: Sei

Type: Katsujin Ken

Martial Arts: Chinese Kenpo

Ma Renka is Kensei’s 17-year-old daughter. She came to Japan in search of her father, who she planned to take back to China. Renka is a fair-skinned young girl of average size. She has bright blue eyes and upper-back-length navy hair constantly done up in an intricate braiding; it has two separate strands on each side of her head and one in the back (similar to cat ears and a tail), and and chin-length bangs hanging over her eyes with sideburns looping up her jaw. Similar to Miu, she sports a noticeably curvaceous frame and large bust (about the same size as Miu).

Renka tends to wear rather revealing Chinese dresses, even at times appearing rather skimpy, that draw attention to her breasts and legs and they even tend to be rather skimpy, suggesting she doesn't have much modesty. She also wears a bell behind each ear.

At first she treats Kenichi with disdain at first, but soon took a strong liking to Kenichi and showed this openly. This "strong liking" later became "strong love", even though she denies it. She is constantly vying with Miu for his attention. This greatly annoyed Miu, possibly even making her feel jealous, which was alleviated by Renka behaving in a catlike manner which Miu has a soft spot for, with is something of a running gag with her and Miu and Nanjou Kisara. Kisara has a soft spot for her because of the cat bells also. She began to acknowledge Kenichi's style of martial arts after her visit to the the dojo, and later gives him advice on developing his own fighting style.

She comes off rather tomboyish and is very hostile towards strangers, such as attacking anyone she is not familiar with or she considers her enemy and even attacking Kenichi due to her not being familiar with him and originally believing him to be weak. She has a strong devotion towards her family, such as wanting to kill her own uncle due to him being the disgrace of the Ma family. She's very forceful, going as far as to use any means to force her father to come home with her.

There's a running gag that she has a habit of chasing moving things, such as when Kenichi surprised her for being in front of her. She is still friendly and caring towards her friends and family, but will be forceful towards them if she wishes (though she calms down when Kenichi asks her to and acts very hyper when he does ask). She tends to be a flirt around Kenichi and tries to win him over Miu and the both are considered rivals due to their feelings for Kenichi. With her father, she's annoyed by his perverted nature and usually puts him in his place and reminds him of his responsibilities at home. Despite this, she loves her father very much.