6. Isshin Kurosaki

Isshin Kurosaki (黒崎 一心 Kurosaki Isshin), real name Isshin Shiba, is the father of the Kurosaki family and former captain of the 10th Division. He is initially portrayed as a silly, fight-loving father who takes a keen interest in what his children are doing. He shows them affection either offensively or with an all-too-happy tone, which elicits comical reactions from his kids, usually in the form of a kickLater in the series he reveals himself as a former captain-level Soul Reaper, regaining his powers after twenty years so that he can avenge his wife's death by killing Grand Fisher. During the Thousand Year Blood War arc, it is revealed that he met his wife Masaki as a teenager, the latter saving him from a Hollow attack, healing him, and revealing herself to be a Quincy. He seems to be aware of activities in the spiritual community, such as Sōsuke Aizen's actions and that Ichigo has become a Soul Reaper.  He later appears in Karukura Town to aid Ichigo in the battle against Aizen. Isshin, like Ichigo, has the zanpakutō technique Getsuga Tensho, but his zanpakutō is named Engetsu (剡月, Scathing Moon). Isshin was planned to be a Soul Reaper from when Kubo created chapter one of Bleach, but his position in Soul Society came later, as the concept of Soul Reaper officers was invented much later. Isshin is known to be as powerful as a captain (if not more so), as he was able to overpower Aizen in combat, even going as far as to knock him aside with the force generated by flicking his finger against his own arm