Ogasawara Gennai is Tenka's close minion and his adoptive son.
He is pure white Great Pyrenees and has black eyes, bushy eyebrows. He has two scars on his left eye.
He's a strong, brave dog and loyal to his adoptive father Tenka for saving him. But as time when on he began to see how cruel his adoptive father is and deserts him.
He wishes to die as an Ohu Solider and fight for others defending them and their home.
Ginga Densetsu Weed: OrionEdit
When Gennai was just a puppy, a human threw him and his siblings into the river in a sealed bag. Gennai was rescued by Tenka and his minions but it was too late for his siblings; they were all dead.
He became a close follower of Tenka. Kenshin over hears him talking to his pack about attacking, but the problem is resolved by talking. Kenshin returns to Kurohabaki Masamune, but later he is sent back out. Gennai finds him with a group of females and pups, and becomes angry and attacks Kenshin.
In the battle, Kenshin manages to rip off Gennai's left eyebrow and calls Hiroyuki to run back to Kurohabaki Masamune to get reinforcements, but Gennai catches and kills him. He later takes Kenshin to the tree and pierces him on a tree branch leaving him to die slowly (though fortunately, Kenshin turned out to be alive as he was later rescued by the Koga Dogs who then dropped him off at the long grass to meet Masamune).
Later, Gennai meets Masamune and the two get into a fight. Although Gennai has the strength, Masamune quickly subdues him with his speed and wraps his scarf around his neck before tying the other end to the top branch of a tree in an attempt to hang the sheepdog. Gennai falls to the ground, apparently dead and Masamune leaves. Gennai is revived by his comrades and he goes back to Tenka. Shortly after, he sees Blanca holding a female and her puppies hostage. He bites Blanca's head and sends to the dog crazy before attacking him again and killing the white shepherd for good.
Ginga: The Last WarsEdit
Gennai appears running through the forest when a storm hits. He and his comrades seek shelter in an old abandoned cottage by Gennai smashing a hole through one of the walls. Inside, they are greeted by a voice who wonders if they pet dogs. Gennai explains his he doesn't trust humans and asks who the dog is. The white Akita introduces himself as Zion.
The following morning, Zion and Gennai travel down the mountain until they come across a river with a wooden bridge. Gennai notices something in the water and upon inspection, it turns out to be a dead boar caught on the posts of the bridge. The dogs haul it out of the water and begin eating. After exchanging information, Zion announces the reason he is in the area is to discover his roots, as he is in fact the grandson of one of Gin's siblings. He runs off and is followed by Gennai, who finds him confronting a bear that is guarding the Ou dogs. Gennai attacks the bear to protect Zion, but is wounded in the process. However, his injury is not severe and he is saved from death when Kenshin arrives. Shortly after, Bob and Shirozaru arrive and the dogs scare the bears away, leaving them alone with the Ou dogs trapped in the prison. After Ken is saved, Gennai heads with the others to find Monsoon and begin the attack.
Gennai arrives with the Pet Dog Squad, hearing Monsoon's and he's bears growls and he tells them to wait. But some of the dogs refuse to wait but the pyrenees refuses to stop them, seeing that he couldn't sit and do nothing he gives command of the squad to Rocket and leaves with Tsuyoshi, Kazuto and Minoru to provide backup.
During the fight Gennai hears that Monsoon is making a big fuss about pet dogs and wonders why. Unsai explains that pet dogs are usually with human hunters that possess powerful weapons.
He got the sickle from Izo and tell him that he got serious injuries and think he can win with his spirit. He ask him that does he want to die with no shame as Ouu Soldier. Gennai tells Izo that he have wanted, he has the sickle, he can die as member of Ouu army. Izo tell Gennai to give sickle back but he tells Izo that he maybe giving up his own life. Gennai trying protect Izo and others, it's a male's biggest wish. Orion and Andy tell Gennai that he can't treat them like kids forever. But he tells them don't rush in without plan and that's why he called them brats. Orion tells him to let him have sickle and Gennai tells him to shut up and he's going to take Monsoon out. Gennai look at Monsoon and think that will make him as Ohu Legend and whether or not, he will beome one depends on.
Gennai tell every of dogs to watch, this wasn't originally his fate and he will dedicate his life for others. He will protect their canines paradise to the death. He tells Orion if he can give his life for him all, then he'll be satisfied. Gennai charge at Monsoon and other dogs tells him that attacks from the front is impossible. Monsoon aims attack to Gennai and but he passes him on legs. Gennai slipped under Monsoon's legs with vigor and without hesitation. He made good use of his body weight and thrust the sharp sickle into Monsoon's left leg. Gennai slipped in with the blade and he stayed where he was. He slashed at Monsoon's legs with all his might. Monsoon fall to the ground and Gennai was pinned and crushed in an instant, he kept on resisting until the end. Gennai had to let go of sickle and barely able to escape after being flattened, he tried hard crawling from underneath Monsoon's belly and Monsoon is about strike his claw to him, but Unsai bites his injured paws. He tell everyone that he's sorry and the sickle, the lifeline and he dropped it. Gennai fell unconscious.
Orion tell Gennai to heads up from Monsoon. Gennai rolls over from Monsoon's legs. Gennai calls Unsai after he got slash by Monsoon.
After Monsoon is gone he hears Orion say to Sirius to forget the new plan blaming him for everything that happened.
Gennai sees Sirius and Zion run off after Monsoon and he says he will go with them, but Sirius says they are going to talk not to fight. As he sees the two leave he tells them they can't do what they want and ask Orion if he's going to let his brother go like this.
See more pictures in Ogasawara Gennai (Photo Gallery).