Kenpachi

Kenapchi was a Shinigami, leader of a key, albeit ostracized, faction of Soul Reapers and adoptive father to Ichigo Kurosaki. When Ichigo betrayed the Soul Reapers and stole the Orb for himself, Kenpachi led the hunt for his former ally. Eventually Kenpachi caught up with Ichigo but he was convinced to help him in the war against Klaxisaur Princess, who was threatening to use the Orb's power to destroy the Soul Society, with Ichigo ensuring Kenpachi did not get the Dragon Ball at the end. Despite losing the Dragon Ball, Kenpachi chose not to get revenge against Ichigo, leading to mistrust among all of his own men.

Kenpachi's Soul Reapers turned against their former captain and put their trust in one of their lieutenants. With the help of Renji Abarai, Kenpachi got his revenge against the mutineers and destroyed his own ship. Kenpachi went to help Ichigo in his battle against Papa. As the planet collapsed into itself, Kenpachi sacrificed his own spacesuit, saving Ichigo and allowing himself to suffocate in deep space.

Abilities
Master Swordsman: Due to the lawlessness of the Zaraki district, Kenpachi's skill with his sword has been honed to essentially a masterful level, letting him strike multiple times with changes of attack type (from slash to pierce) without any difficulty. While still a child, his prowess was great enough to single-handedly kill hundreds of adult fighters and wound Retsu Unohana, the 1st Kenpachi, in battle. His unpolished skills, but immense might with his sword allow him to always fight with one hand free, only using both hands when facing opponents he feels will beat him otherwise.

Hand-to-Hand Combat Expert: While preferring to use his blade in battle, Kenpachi has proven several times to be very dangerous while barehanded, showing considerably effective brawling prowess. He can easily catch an opponent's attack with a single hand, perform powerful punches and kicks, and easily subdue opponents with throws and take-downs.

Immense Spiritual Power: Even by a captain's standards, Zaraki's Reiryoku is monstrous. He has so much that even while wearing his energy-sealing eyepatch, his prowess is not noticeably hindered as he is still able to fight two captain-level opponents at once who were both using their Bankai.

Damage Resistance: The intensity of Kenpachi's Reiryoku also acts as a sort of armor, making it impossible for him to be harmed by anyone not at least at his level of power.

Supernatural Strength: Kenpachi possesses a very large degree of physical strength, most commonly displayed by his ability to push back his opponent's attacks with a single arm, even if the opponent's weapons and attacks are gigantic in size.