Kittan Bachika is the oldest of the Black Siblings. During his first encounter with Team Gurren, he mistakenly confuses Kamina for a Beastman. This is reconciled, when it is discovered that Kamina is piloting the Gunmen, Gurren. Shortly after, the two teams (the Black Siblings and Team Gurren) come into contact with the sixteen-headed enemy Gunmen, whom the Black Siblings had crossed paths with earlier. After the eventual defeat of the enemy Gunmen, the two teams part ways. (In the manga, they meet up with Kamina and co at the same time Viral makes his entrance.) Kittan eventually parted ways with his sisters, who join up the Team Gurren soon after, before returning to aid Team Gurren against Thymilph in his own acquired Gunman, King Kittan, and with others inspired by Kamina who obtained Gunmen of their own they have captured and customized. This event consequently leads to the formation of Team Dai-Gurren. As a result of the death of Kamina, Kittan temporarily takes over as the leader (though self-proclaimed) of the team, but after Simon recovers from his depression over Kamina's death, Kittan transfers the control of leadership to him.

After the war, Kittan became the Chief of the Legal Affairs Bureau in Kamina City, but starts to resent Rossiu when he sentences Simon to death and then allow his sister Kinon to wear an explosive-equipped vest to accompany Simon in the case he attempts to escape. Though he eventually understands the position Rossiu was in, Kittan resigns after discovering about Rossiu's plan to evacuate Earth using the Arc-Gurren, along a small fraction of the human population, and abandoning the rest to die, when the moon falls. Before leaving, he demanded Rossiu to return the Core Drill he took from Simon and rushed on his Gunman to deliver it back to him. In episode 25, Kittan meets his demise by protecting the other members of Team Dai-Gurren. Super Galaxy Dai-Gurren, unable to escape the incredibly dense space sea produced by the Death Spiral Machine, is ordered by Simon to move towards the center of the sea, where the Machine rests surrounded by a powerful shield. After the ship's weapons fail to get anywhere near the shield, Kittan offers to take the Space King Kittan on a mission to destroy the shield and fire spiral-based missiles at the core of the Death Spiral Machine, but not before stealing a kiss from Yoko, and apologizing for "[his] selfishness". Though he successfully breaks through the shield, the Space King Kittan is crushed by the immense gravity of the space sea, leaving Team Dai-Gurren shocked at what they think is the death of Kittan. However, the original King Kittan, wielding one of the drills that broke off from the Gurren-Lagann when it was attempting to transform Super Galaxy Dai-Gurren into humanoid form, flies towards the Machine's core, screaming his final speech. Kittan awakens his own Spiral Energy, melding the drill to his King Kittan, and performing his own variation of the Giga Drill Breaker to destroy the Death Spiral Machine. The resulting explosion engulfs and kills Kittan, who notes before he dies that spiral power is really something, but also frees the Super Galaxy Dai-Gurren from the space sea, allowing Simon to transform it into Super Galaxy Gurren-Lagann and fulfill Kittan's dying wish.

In the epilogue, a memorial site, in the form of a sword, is seen in his honor right alongside Kamina and the other members of Team Dai-Gurren.