Born in Okinava and raised as a spoiled kid. He is bigger than his coevals and often uses his strength to torture the ones he does not like. When he is 8, he becomes an orphan. His only and closest relative is his grandfather who lives in Mexico. His grandfather takes Sado with him and turns him from a spoiled kid into a good person. Sado's grandfather teaches him that the great power he has, is not for hurting people. Because of his height and his unwillingness to use the power for him, Sado is often beaten up by his coevals. Sado uses his power only when he has to help others.
Another who is tortured by his coevals is Kurosaki Ichigo. They help each other and this connects their lives. Ichigo often calls him Chado instead of Sado.
One day Sado buys a talking and smart parrot, who is believed to bring bad luck to his owner. Soon after that, strange things start to happen around Sado. It seems like something is after him. He starts seeing invisible creatures. Sado discovers a big spiritual potential in him and starts developing it. He gets entangled in the world of the shinigamis, but Sado is ready to do anything for his friend.
Translated from Bulgarian language by: Ted^Maverick (TV_Squad)