Renji Abarai Enemies

The manifested spirit in Mayuri Kurotsuchi's zanpakutou

a member of Vandenreich

Byakuya recently turned against The Soul Society and sided with Muramasa's Rebellion. Renji attempted to arrest him but failed and nearly died in the process.

The Fūrā is a massive entity of unknown origin that allied itself with Sōsuke Aizen when he joined with The Menos. The creature shares an unknown connection to The Gillians, however it is not known if it is actually a Hollow or something else entirely.

Former Captain and Leader of the Dark Ones

Gin Ichimaru is the former captain of the 3rd Protection Squad in Soul Society and one of the three traitor captains who currently lead the Arrancar of Hueco Mundo. A child prodigy whose sociopathic tendencies grew as he matured, Gin is fiercely loyal to Sosuke Aizen.

A Bount that serves Jin Kariya.

He is Grimmjow's fraccion, and Szayel Aporro Granz older brother.

The manifested spirit in Shuhei Hisagi' zanpakutou

Kokuto is the main villain in Bleach:Hell Chapter

Muramasa is the manifested spirit of a renegade Shinigami named Kouga's Zanpakutō. Muramasa has tapeworm-like abilities that allows him to control other Zanpakutō, Muramasa has since been forcibly cut off from Kouga and is being overtaken by a Hollow he recently forced to become a temporary host.

An Arrancar that is leader of the Exequias.

The manifested spirit in Byakuya Kuchiki's zanpakutou.

Sosuke Aizen is a former captain of the Gotei 13, After betraying the soul society, He became supreme lord in Hueco Mundo. He led a huge war against his former allies in hopes of getting the Oken (Kings Key) and destroying Soul Society, but was eventually recaptured and is imprisoned.

Szayel was 8th Espada of Aizen's Army. He represents the Madness aspect of death. He helped Nnoitra attack Nelliel Tu Oderschvank.

The Fourth Arrancar in Aizen's Espada. Has defeated Ichigo in combat with only one hand, and is noted for his depressing facial expression and seeming lack of interest in fighting.

The manifested spirit in Renji Abarai's zanpakutou. taking the form of woman and a young kid as the baboon and snake part, respectivaly