Bazz-B is a Quincy and a member of the Vandenreich's Stern Ritter with the designation "H"—The Heat.

Upon receiving the orders of Yhwach, he and the other Stern Ritter gather at the Gate of the Sun, before traveling to Seireitei in order to participate in the conquest of Soul Society.

Once there, he and the other Stern Ritter create pillars of blue flames prior to engaging the Shinigami in battle, allowing members of the 3rd Division to surround his position. As he emerges, Bazz-B ambushes Lieutenant Izuru Kira from afar, destroying a significant part of his right torso and inciting three seated officers to release their Shikai. Simultaneously dispatching Taketsuna Gori and Asuka Katakura, he then eliminates Riku Togakushi with similar ease.

(Source: Bleach Wikia)