Choe Neng Poww

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

Character outline
Po is a very large and rotund Arrancar. He is the largest of Barragan's fracción and even towers over Sajin Komamura, the tallest Shinigami in the Gotei 13. 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. He wears the white standard arrancar uniform but it is customised to look like a chinese garb.

Despite his unusual size, Po 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 Barragans's Fracción to be seen, standing right 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 blocked off by Yamamoto's Shikai, Barragan himself decides to give all orders. Po 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. Po 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 prepares to finish Ikkaku off but is saved by the timely arrival of Sajin Komamura, whom catches Po off guard and punches him in to the side of a building. Po is immediantley back on his feet, unscathed. He then proceeds to punch Komamura, sending him flying several miles. He then releases his zanpkauto.

Zanpakutō
Po's zanpakutō is named Calderon (Spanish for cauldron, also the spanish name for a species of whale) and it's release command is Breathe. 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 with a stature like that of an ape.