18 years old. Male. A criminal from Edo who was taken in by Keizo and joined the Soryu Dojo. Because Koyuki's frail health reminds him of his late father, he has dedicated himself to nursing her. He has promised to marry Koyuki and eventually inherit the Soryu Dojo. While he was away visiting his father's grave to report his upcoming marriage, Koyuki and Keizo were poisoned. Though not as strong as Keizo, he is an incredibly powerful martial artist; he once took down dozens of grown men with his bare hands. He refers to Koyuki as "Koyuki-san" and Keizo as "Master." First person: I (rough, casual).

16 years old. Female. Keizo's daughter. A famous beauty in the village. Though naturally very frail, she recovered enough to handle housework thanks to Hakuji's devoted care. She has promised to marry Hakuji. She has been poisoned. She is calm and composed, but has a slightly spoiled, sweet side. She refers to Hakuji as "Hakuji-san" and Keizo as "Father." First person: I (soft, polite).

30 years old. Male. Koyuki's father and Hakuji's master. A blunt, straightforward man; when he once asked Koyuki point-blank, "So, what do you think of Hakuji?", she got embarrassed and pummeled him. This bluntness gets worse when he's drunk. He is incredibly strong and beat Hakuji to a pulp when they first met. He is always smiling and cheerful, which makes it even scarier when he beats people up while grinning. He has been poisoned. He refers to Hakuji as "Hakuji" and Koyuki as "Koyuki." First person: I (rough, casual).

A piece of trash who is obsessed with Koyuki. Realizing he could never beat Keizo or Hakuji in a fair fight, he poisoned the well. Male.