Tenko Chabashira is a student in Ultimate Academy for Gifted Juveniles and a participant of the Killing School Semester featured in Danganronpa V3: Killing Harmony.
Tenko is titled as the Ultimate Aikido Master (Super High School Level Aikido Master). She is a practitioner of the martial art she created with her master, called "Neo-Aikido".
After she has been successfully participated in the 53rd Killing Game, Tenko's memories and past were fabricated by Team Danganronpa as follows: As a child, Tenko suffered from severe anger tantrums and over-activity to the point that her parents were worried that she might not be able to fit into the society. Not knowing how to handle her, they sent her to live in a temple to help discipline her mind. However, it seemed that Tenko was trouble even for the priests, so they had to come up with something else. During her mental training at the temple, she called the head priest "Master" and respected him greatly, and thus he declared himself the Master of martial arts. The head priest and Tenko came up with the martial arts of "Neo-Aikido", an unusually aggressive form of Aikido, to channel Tenko's energy into a constant activity. Neo-Aikido helped Tenko and made her notably calmer, though she still remained very aggressive and overactive when compared to the norm. However, she also seemed to take the made-up martial arts a bit too seriously and dreamed of making it a national sport. The Master also began to use Neo-Aikido as a way to develop Tenko's moral compass. As practitioners of Neo-Aikido, Tenko and her Master even used to wear masks and acted as "heroes of justice", helping people during day and night. This included things like carrying old woman's belongings, helping a child cross the street, catching thieves, punishing cheaters and sexual predators, and even helping girls who had tough break-ups. In order to control her bad habits, the Master began to claim that various things would weaken her Neo-Aikido spirit and thus should be always avoided, such as being too excited about Christmas or Valentine's Day, eating more than three sweets a day, or failing to keep her environment clean. Because of his anti-romance stance, he also wanted her to not get close with boys and thus told her that interaction with them would weaken her. Tenko believed everything without question and took it all very seriously, and she had very little interaction with boys. She already had a dislike for men, seemingly due to all the sex offenders she had seen, but this turned into hatred as she begun to consider all men enemies that would drain her spirit and prevent her from mastering Neo-Aikido (though, she never realized that this should've logically included her Master as well). She believed that men shouldn't even touch her. Other bad influences from the Master included the belief that ex-boyfriends deserve severe physical punishments, and that you can even use unfair methods such as weapons or attacking before the match starts.
Tenko has fair skin, her legs maybe a little tanned, and is quite an athletic build, with notably wide shoulders and quite large muscles, which is probably due to her relentless Neo-Aikido training. Her eyes are a warm green color, her eyelashes are relatively thick, and she has a two slightly longer clumps of them sticking out at different angles, one towards the side of her face and the other diagonally down her cheek. Her hair is dark brown with a slight green tinge, and rather thin, and in length, it reaches about halfway down her calves. It's tied behind her with white ribbons in two low bunches, three extra hair ties placed at even intervals down her pigtails, the hair between them split into two clumps, leaving the last and longest stretch loose. A large green pinwheel bow with a white floral pattern is attached at the back of her head by two hair slides, and she also wears a lilac headband with a star-shaped adornment on the left side, and a matching-colored choker with a golden bell at her neck. She has a small mole below her bottom lip, centered to the left.
Her uniform is a double-breasted crop top, a rather desaturated blue, with the flannel collar of a seifuku, a large white bow sitting just underneath it in the center of her chest. This collar is white, with a blue line around the edge which matches her knee-high socks and the cuffs of her sleeves. Her skirt is very short, and has two layers of thick frills, described by Kazutaka Kodaka as a "fashion disaster that shows off the light-heartedness of a sporty girl mixed with the harmonious Japanese essence", and it is stated that Tenko added these frills herself to apparently make her uniform more appealing to girls. On her feet, she wears waraji, which she believes to be a common martial artist stereotype.