Kaien arrives and introduces himself.
Kaien shares a drink with Rukia.
Kaien sees Miyako off on her last mission.
Kaien finds his wife unconscious but seemingly alive.
Kaien and the others discover more corpses left by Miyako.
Kaien, Ukitake, and Rukia depart in search of Miyako.
Kaien, Ukitake, and Rukia find Metastacia.
Kaien confronts Metastacia alone.
Kaien cuts off two of Metastacia's arms.
Kaien grabs Metastacia's tentacle while standing on his back.
Kaien rips off one of Metastacia's tentacles.
Metastacia uses Spirit Body Fusion to enter Kaien's body.
Kaien possessed by Metastacia.
Metastacia after fully possessing Kaien.
Kaien forgiving Rukia for killing him.
Rukia cries after Kaien dies.
Rukia clutches Kaien's corpse.
Rukia brings Kaien's corpse back to his family.
Ukitake pressures a reluctant Kaien to be his lieutenant.
Rukia joins Kaien in the training field.
Kaien declares that Rukia is here to protect.
Kaien explains his view on hearts to Rukia.
Kaien warns Rukia to never die alone.
Aaroniero displays Kaien's unique fighting style.
Kaien gives Rukia a canned drink.
Kaien prepares to confront
Metastacia after learning that he killed Miyako.
Kaien confronts Metastacia.
Kaien exerts his
Reiatsu as he prepares to fight.
Kaien stands atop Metastacia after severing one of his arms.
Kaien is wounded by Metastacia.
Kaien rips off one of Metastacia's tentacles.
Kaien faces off against Metastacia.
Metastacia possesses Kaien using Spirit Body Fusion.
Metastacia uses Kaien's body to attack Rukia while merged with Spirit Body Fusion.
Rukia impales Metastacia, restoring Kaien's consciousness.
Kaien thanks Rukia with the last of his strength.
Rukia clutches Kaien's corpse.
Rukia brings Kaien's corpse back to his family.
Kaien berates Rukia for losing her concentration.
Kaien and Rukia discuss what they are fighting for.
Kaien asserts that every battle is about protecting the heart.
Kaien explains his belief in hearts forming between people.
Kaien details how people leave their hearts behind after they die.
Kaien's sealed Zanpakutō.