Kushinada Chikage made her first appearance in Battle 188. At the age of 13, she is classified as both Sei and Satsujin Ken types, with her Yomi symbol being Water. She practices Kushinada Style Jujutsu and is a first-year student at Kenichi's school. Chikage has long black hair tied to one side down to her upper back and long fringe framing her face. She typically wears her school uniform.
Chikage often displays a melancholic expression among Yomi members and appears to be a loner who doesn't socialize much. In public, despite being a prodigy, she sees herself as normal and others as inferior, similar to fellow Yomi member Radin Tidat Jihan. Miu compares Chikage to herself at that age, noting their similar eyes but different paths due to Miu's grandfather guiding her away from dangerous tendencies related to her Dou Ki.
Later, it is revealed that Chikage has a strong sweet tooth, stemming from being denied sweets during her training. After interacting with Kenichi and his friends, she develops a childlike personality when trying to have fun. However, around her master, she switches to "Yami Mode" and becomes a cold-blooded fighter. Despite her extensive knowledge, she tends to be naive and lacks common sense.
Initially, Chikage wanted to kill Kenichi but later saw him as a friend, even showing concern for his well-being. She became embarrassed after forgetting their fight and would run away whenever they met. It is implied that she is becoming more "normal," as seen by her less cold and emotionless look at school post-chapter 365. Niijima Haruo, whom she developed a bond with (though partly due to his exploitation of her naivety), considers making her part of the Shinpaku Alliance.
Chikage's profound knowledge contrasts with her naivety. For example, she believed planting a four-month-old seed would result in immediate blooming, only to be corrected by Kenichi. She mentioned rarely going out and having fun, which explains the separation between her "Yami Mode" and "Child Mode." Her knowledge was likely imparted through rote repetition, contributing to her lack of common sense or understanding behind some information.
