command of the rogue Soul Reaper Sōsuke Aizen and the ten strongest Arrancars known as the Espadas. The 10 Espadas are numbered 0–9, 0 being the strongest and 9 the weakest. But the rating also works with spirit pressure density numbered 1–10, with Espada's 0's power contained with a 10 tattoo. Sōsuke Aizen is the main antagonist of the pre-timeskip half. While introduced as the captain of Squad Five later revealed to have been behind various events prior to the series, Aizen has orchestrated a series of events in the Soul Society to obtain the Hōgyoku for his goal to create an Ōken to kill the Soul King with the aid of the Arrancars and rogue Soul Reapers he recruited. However, revealed to have played an indirect role in Ichigo's conception, Aizen is defeated by him, before being captured by Kisuke and sentenced to the Muken for twenty millennia. Bounts The are a group of humans with special abilities. They are the main antagonists during the anime-exclusive Bount and Bount Assault on Soul Society arcs. The Bounts live eternally due to an accident during a scientific experiment earlier in the Soul Society, where they were created, and began to eat the souls of human beings to gain more power. They each have a unique weapon known as a Doll, a familiar which is its creator's power given physical form. Dolls are mostly self-sufficient creatures when released, although they tend to be used as weapons in various ways such as a large battle axe or a snake, as a sword and whip. Their leader Kariya, motivated by the destruction of himself and all connected to him, plans to invade the Soul Society along with the remaining Bounts to destroy it and themselves. However, with the exception of his friend Gō Koga, Kariya managed to have his forces wiped out by the Soul Reapers prior to himself being killed by Ichigo Kurosaki. IGN criticized the Bounts as being "lame bad guys," noting that the bittō (the Bounts’ mosquito-like creatures that collect souls) in particular were like "something straight out of a bad sci-fi movie," but admitted the Bounts were "decent plot devices" to develop the other characters. Jin Kariya is the Leader of the Bounts who planned to destroy the entire Soul Society through the Jōkaishō, the device that created the Bounts. He was originally Eugene Currier, a boy who was befriended