Bawabawa

, is a giant, eel-like Hollow whose mask consists of a simple plate on his head with a pair of horns. He acts as both a pet and transportation for Pesche, Dondochakka, and Nel Tu. Bawabawa tends to get upset for not being included in the group's super sentai-styled introduction sequences. He displays his displeasure with this by breaking down and crying. 

Character Outline
Initially, Nel claims that Bawabawa cannot survive without sand, thus explaining why he does not follow the group into Las Noches. During a battle with Szayel Aporro Granz, however, Dondochakka reveals the ability to spit Bawabawa from his mouth. Despite his fearsome appearance, Bawabawa is actually rather emotional and not evil, but will fight if necessary.

Bawabawa appears on one of Gin Ichimaru's "Arrancar Research Time" segments. Gin comments on his size and Bawabawa humorously tries to swallow him, forcing the latter to use Shinsō to push him off.

Hueco Mundo arc
Bawabawa is first seen playing eternal tag with Nelliel Tu Odelschwanck, Pesche Guatiche and Dondochakka Bilstin, with the three Hollows chasing Nel. Unfortunately, Yasutora Sado, Uryū Ishida and Ichigo Kurosaki believe that Bawabawa is trying to kill Nel, as a result Sado assaults Bawabawa in attempt to help Nel. Nel clears the misunderstanding up by explaining to Ichigo and company. Soon after, the giant Hollow Runuganga attacks the group. When Ichigo's Getsuga Tenshō fails to destroy Runuganga, Nel informs Ichigo that Runuganga's weakness is water, while Bawabawa is seen trying to climb up from the sand pit. However, unable to find any water, the group is still unable to hurt Runuganga. However, the tables are turned when Rukia Kuchiki, who came along with Renji Abarai, destroys Runuganga with her ice-type Shikai. The group then rides on Bawabawa to the wall of Las Noches. Nel appreciates Bawabawa's help. After the group enters Las Noches, however, Bawabawa disappears.

Runuganga appears before them again and sends the group down to the Forest of Menos. Bawabawa aids the team by following Rukia's scent and eventually she finds them instead, along with Ashido Kanō, a shinigami who had been fighting in the forest for years. They manage to get back to the surface and enter Las Noches, but Ashido stays behind to fight off the Menos so the gang can escape. 

During the fight between Pesche and Szayel Aporro Granz, Pesche explains that Bawabawa is actually one of many spiritual combat insects that dwell within Dondochakka. Pesche rides on top of Bawabawa as Bawabawa charges toward Szayel Aporro Granz, however Szayel easily stops Bawabawa's movements with one of his tentacles. After their Cero Sincretico technique, Bawabawa is not seen, presumably back inside Dondochakka's body.

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