Choe Neng Poww

Pō (ポウ, Pō?) is an arrancar in Sōsuke Aizen's army and one of Barragan's five Fracción.

Character outline
Pō is a very large and rotund Arrancar. He is the largest of Barragan's fracción, towering over even Sajin Komamura. His hollow hole is not visible but his mask remnants consists of a large plate across his chin with two horn like appendages. He also has two triangle like lines running just below his eyes that have circles in them. His hair is styled in to that of a Medieval Monk. Pō wears the white standard arrancar uniform but it is customised to look like a chinese garb. He wears a default hakama like all other arrancar and his sandals resemble traditional martial arts training shoes.

Despite his unusual size, Pō displays a calm, contemplative personality and rarely speaks. Like his fellow fracción, he holds his leader Barragan in high regard, calling him their "god" and praying to him before battle.

Synopsis
He is the first of Barragan's Fracción to be seen, standing directly behind Barragan as a Garganta is opened to the fake Karakura Town. He along with Barragan and the rest of his Fracción are summoned by Aizen to the fake Karakura Town to do battle with the Gotei 13. However, once Aizen, Ichimaru, and Tōsen are trapped in Yamamoto's Shikai, Barragan himself decides to give all orders. Pō and Barragan's other Fracción then pull out a throne for him to sit upon.

After discovering the four pillars that keep the real Karakura Town in Soul Society, Barragan sends each member of his Fracción to a different pillar to destroy them, stating that if they are going to guard them using ants he'll just have to send dragons to crush them. Pō is sent to do battle with Ikkaku Madarame. He was the only Fracción who achieved their purpose, destroying one of the pillars after he defeated Ikkaku.

He wonders if Ikkaku had any special abilities to show him, while thinking he's dead. Ikakku then rises to start again, at which time Pō threatens him to show any further power he has. After Ikkaku denies having any further power, Pō prepares to finish him off but is saved by the timely arrival of Sajin Komamura, whom catches Pō off guard and punches him in to the side of a building. Pō is immediantley back on his feet, unscathed, and is also unfazed by the captain being a animal. He then shows a "real punch" back to Komamura, sending him flying several miles. He then releases his zanpkauto, calling it the "best punch".

As he tries to crush 7th Squad Lieutenant Tetsuzaemon Iba( with Ikkaku on his back ), Komamura steps in and blocks his attack, followed by Komamura throwing the massive arrancar down. Po, unharmed, "yawns", which is actually him building up cero inside of his mouth. Komamura then releases his bankai and "crushes" Po, now presumably dead.

Zanpakutō
Pō's zanpakutō is named Calderon (巨腕鯨, カルデロン, Karuderon?, Spanish for cauldron, also the spanish name for a species of whale) and it's release command is Breathe (気吹け, tsuku?). In it's unreleased state it takes the form of a tiny pocket knife resembling a katana that he keeps in an equally tiny scabbered up his sleeve.

When released, Pō's entire body begins to swell, and he balloons into a massive creature, highlighting his size even further. Some details on his body are much like a whale's( thus the name of his zanpakutō )