Weed is the son of Gin and Sakura. His mother becomes extremely ill so he went hunting food for her, he encounters GB the English Setter who gives Weed the bird he caught. GB gets inspired by Weed's bravery when he tries to save Sasuke from the farm's guard dog. When he is fighting, Weed does the Battouga without knowing it and Smith witnesses this. Smith, GB and Weed set off to Ou after Sakura dies so that Weed can meet his father. GB becomes Weed's God father and gives him his name.

Gin and Weed are similar even though they haven't met. Weed shares similar characteristics and opinions. He helps his friends, strangers who are danger and he believes violence is not necessary to solve every problem. Weed thinks his father is killed when he runs into Gin's substitute, Tokimune. Tokimne gets killed infront of Weed's eyes and he gets very upset someone risked his life for him. He aids the Ou pack in any way he can to bring down Kaibutsu. When he and the Ou soldiers meet Jerome's group he is able to cross the canyon just like his father did in the past to prove he's a real soldier.

Weed's first kill is Kaibutsu when he pushes him off a cliff and positions him in the air so the beast would get impales on the log with the sharp branch below. Jerome then becomes his advisor and trains him each day to become a strong fighter. Everyone agrees that in Gin's abscense that Weed would be the new leader. Akame runs to Ou and meets Weed for the first time. He notifies Weed that Hougen is a new threat and has captured Gin and John. Weed leaves Mel and some other soldiers to take care of the exhausted Akame and to guard Gajou. Those not left at Gajou leave to gather soldiers to help defeat Hougen and save Gin. Each day Weed shows his care and compassion for others. His compassion gets Rocket to change from Hougen's side to join the dogs of Ou. Rocket tried to kill Weed but is is defeated by Jerome.

Rocket asks to join again after Jerome puts him in his place. When he asks for forgiveness and to join, Weed accepts but isn't fully forgiven until he risks his life to save GB and Weed hanging on the side of a cliff after being blown by bad winds. Weed later encounters Kyoushiro in Shiga and fights him. He tells Kyoushiro not all adults are abusive and that he is dissapointed in Kyoushiro trying to solve all issues with violence. He suggests raising the young dogs in his pack with kidness, that is a parent's job. The assassins Thunder and Lecter show up and injure GB, Rocket and two of Kyoushiro's followers. Weed fights Thunder while Kyoushiro fights Lecter. Weed's bearhound instincts wake up while battling the deadly assassins. His men inspire Teru to forgive his father who in the end stands up for his son and attacks the assassin brothers. Weed later lets Lecter and Thunder go after Jerome and Hiro beat them up. Kyoushiro then joins Weed's pack along with his 50 young followers. Weed's sense of justice, care and maturity gain him as an ally.

In the manga Weed's story continues. He meets new enemies, new allies, reunites with his long lost brothers Yukimura and Joe and he eventually finds a mate - a young kishu named Koyuki who in the end of the manga bears Weed's four pups, Orion, Rigel, Sirius and Bellatrix.