Tomari was a soul reaper that obtained a position in the royal guard. He was known as one of the strongest member there have been. He currently resides in Hueco Mundo and have been training with Genso and have been to hell once or twice or even more and also know Naraku because there were friends in childhood when Tomari was 702 years old and thats a long time and now he is 2000 years old now and now betrayed Naraku because he wasn't doing the right choices and also is the soul king but now not because he betrayed soul socity.And now searching for the 5 orbs because to kill Naraku because he has killed to many people so he can't forgive him Tomari father is the ruler of Fearītēru but Tomari left his own home town even if he was the son of that place.