List of Hollows

Hollows
Those hollows listed here are those given names, either in the series or accompanying databooks.

Acidwire is the snake-like hollow form of Orihime Inoue's brother, Sora. He regains his reason and personality after having his mask partially shattered in combat and purifies himself with Ichigo's zanpakutō. He has a humanoid upper body with snake-like lower body. He gets his name from his ability to spit acid.
 * Acidwire (アシッドワイヤー) –

Shrieker is a bat/frog type hollow. Shrieker can fly and control little creatures he describes as his "artillery." The creatures can shoot leeches out of their heads that attach to anything they hit. By vibrating his tuning fork-shaped tongue, Shrieker can make the leeches explode. Shrieker attacks Yasutora Sado after he obtains a cockatiel possessed by the spirit of a dead child. The boy's mother was killed by Shrieker when the latter was a living serial killer, and he used the boy to attract and devour shinigami who came to put the boy's soul to rest. After being killed by Ichigo Kurosaki, he is sent to Hell for committing serial murder as a human, as a zanpakutō can only wash away the sins a soul commits as a hollow.
 * Shrieker (シュリーカー) –

Metastacia is an experimental hollow used by Sōsuke Aizen years before the start of the series. In his natural state, he exists as a six-limbed creature with a large, flame-patterned mask and a flock of tentacles on his back. When a shinigami grabs these tentacles, their zanpakutō is destroyed; however, the power is only good once every night. Metastacia's main power is the ability to merge with shinigami, taking over their body to use as his own. Unlike human possession (two souls in one body), the fusing of two spirits is irreversible. After a short period, he is able to eat them from the inside-out to re-create his original form.
 * Metastacia (メタスタシア) —

Metastacia took over the body of Miyako, a shinigami and Kaien Shiba's wife, and used her to kill her fellow squad members before eating her. When Kaien Shiba battled Metastacia, he too was possessed and Rukia Kuchiki was forced to kill him to destroy the hollow. However, Metastacia was designed to return to Hueco Mundo after being killed, so he could be analyzed. Still merged with Kaien at the time, this led to the two becoming one being upon returning. Sometime after, the merged creature was eaten by Aaroniero Arruruerie, giving him not only Metastacia's abilities, but Kaien's as well.

Metastacia's name most likely originates from the Greek word metastasis, meaning 'a change of state', which also refers to the spread of cancer throughout the body.

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.
 * Bawabawa (バワバワ)

Initially, Pesche and Dondochakka say that Bawabawa can't survive without sand, thus explaining why Bawabawa doesn't follow the group into Las Noches. During a battle with Szayel Aporro Granz, however, Dondochakka reveals the ability to spit Bawabawa from his mouth. Pesche explains that Bawabawa is actually one of many spiritual combat insects that dwell within Dondochakka.

Pesche is a fairly harmless, humanoid hollow whose mask resembles an insectoid head with a large pair of mandibles. He wears an eyepatch and a loincloth. His hollow hole is slightly lower than normal, positioned near his stomach instead of his chest. He and Dondochakka were once Nel Tu's Fracción, but had their masks forcibly removed by Nnoitra and were left for dead with Nel. After realizing that their master had reverted to a defenseless child, he and Dondochakka pledged to protect Nel by never telling her about her former life. He spent the following time traveling around Hueco Mundo with them. He accidentally accompanies Uryū Ishida into Las Noches, having thought he had followed Ichigo. This initially upsets Pesche as he believes Uryū to be the weakest member of the group due to his appearance, while thinking that Chad is the strongest.
 * Pesche Guatiche (ペッシェ・ガティーシェ) —

Pesche possesses an ability he calls "Infinite Slick" (無限の滑走（インフィナイト・スリック）), in which he sprays his saliva at an object, severely reducing its friction. Though seemingly useless, he is able to render Cirucci's weapon ineffective by coating it in his liquid, and it can be used similarly to make opponents lose their footing or grip on things. The liquid is limited in supply, contrary to its name. Pesche states that he named it as such because "Finite Slick" didn't sound nearly as cool. He can also perform a synchronized cero attack with Dondo. In addition to his powers, he carries an energy sword he calls Ultima (究極（ウルティマ）) which he compares to one of Uryū's Seele Schneiders, humorously drawing it from his loincloth using its vaguely phallic hilt.

Dondochakka is a large, spotted humanoid hollow with a tiki mask and compound eyes. He appears to speak with a yakuza-style accent and is fairly tame in comparison to other hollows. Despite his menacing appearance, he is prone to tear-filled outbursts at the slightest provocation, usually when he's worried about something. Dondochakka once served Nel when she was an Espada, but had his mask torn off by Nnoitra and was left for dead along with Pesche and Nel. After realizing that Nel had reverted to a defenseless child, he and Pesche pledged to protect Nel by never telling her about her former life. After that event, he travels Hueco Mundo with Pesche and Nel Tu, and their pet, Bawabawa. Like Pesche, he attempts to chase after Nel and Ichigo in Las Noches, but ends up finding Renji instead, who he frequently irritates with his clumsiness and emotional outbursts.
 * Dondochakka Bilstin (ドンドチャッカ・ビルスタン) —

As described by Pesche, Dondochakka possesses numerous insect spirits within his stomach. One of these is the worm hollow Bawabawa. He can spit these spirits out at will as allies in combat. In addition, he carries a kanabō inside his stomach. He can also perform a synchronized cero attack with Pesche, called cero sincrético.