{Muneakira}
The leading man, and a samurai of noble spirit. A master of the Shinkage-ryu fighting style, his main concern is taking over the Yagyu Dojo, as the new Master. The Yagyu family has been teaching the Tokugawa clan swordsmanship for centuries, and Muneakira, or "Mune" for short, aims to keep that traidition strong. Officially under the Tokugawa clan, Mune has just gotten to Buou Academic School (a school where only warrior students can attend, and a breeding ground for Japan's next great leaders) and he's already found himself with a world of problems... and two of them like to follow him around.
Has great skill with a sword, and is a childhood friend of Sen Tokugawa.

{Princess Sen}
Princess of the Tokugawa clan, Sen is as beautiful as she is difficult. She holds herself in high esteem, to the point of isolation at times. Quick to anger, Sen loves to abuse Hanzo, and treats her like a lower being, even though Hanzo clearly shows great affection towards her. Her rule is absolute, and she guides her followers with an iron fist, but seems to revert to a regular, whiny, and childish girl around Mune, something that Mune takes advantage of, and a flaw that Hanzo is quick to notice. As far as nobility goes, she's an odd duck in a small pond. Relies on her brother excessively, and seems to have somewhat of a crush on Muneakira. She is the third person to be turned into a master samurai by Muneakira.

{Yukki or Yukimura}
Part of the Toyotomi clan, Sanada is a skilled Feng Sui reader, able to derive the future from a feng sui board with ease. More than anything however, she's known for her opposition of the Tokugawa clan, and is a wanted criminal. She became a master general through Muneakira. Currently attending her first year at high school and appears to have feelings for Muneakira.

(Source: ANN)
Her weapon of choice is ornamental fans, and when she becomes a master samurai, she gains the ability the produce cyclones and great gusts of wind with them. Her outfit becomes a white, school-issue swimsuit, with a kimono loosely draped over it.
She is extremely conscious of her wide forehead and non-existent chest, blowing-up on anyone who points out either of them. She prides herself on being a cunning strategist, preferring to win battles using her intellect, rather than her brawn.
Her master samurai mark is on her bottom.

{Jubei}
Muneakira's first master samurai, with the contractual mark on her chest. She also has a power level of five million when she transforms, but in this state she has shown a sadistic side, yet she is an honourable warrior who gives respect to those whom have earned it. In her normal form however, she has no memories of her former life, and has an obsession with her "onii-chan" (big brother), Muneakira. She is also airheaded, innocent, and acts very much like a child, which is reinforced by the fact that she refers to herself in third-person. Her weapon is a daisho set, with the katana unusually colored.