Captains

Ulquiorra Cifer/Ulquiorra Schiffer - 4th espada
read as Urukiora Shifā

Espada cuatro (4) in Aizen's army of Arrancar, and is one of the series' central antagonists. He is responsible for much of the conflict currently taking place in the show's continuity, as he is one of Ichigo's principal Arrancar rivals; the other differentially being Grimmjow Jaegerjaquez.

-He is typically slender and melancholic in appearance. He appears somewhat like a cold hearted person. He is believed to be the only arrancar/espada to have a 2nd ressurecion form. he was also able to kill ichigo twice.His cero is green...

Rank: Captain
Zanpakutou info:

Shi-Kai → Unknown

Ban-Kai → Kokujoutengenmyouou An armoured giant appears.

Biography:
Komamura Sajin first appears in the emergency Taicho meeting that questioned Ichimaru Gin’s apparent slip of duty in letting the ryoka go. Standing next to Tousen Kaname and Aizen Sousuke his relatively bigger size was readily apparent, but beyond that little is known of him except that he wears a sort of helmet.

After Aizen’s death, we again see Komamura as he visits Aizen’s body in the 4th Squad Relief Station, accompanied by Tousen, whom he appears to be rather close...