Tesla is a slender male Arrancar with blond hair, an unusual blue marking on his right cheek, and an eyepatch over his right eye. He stands out from other Arrancars by wearing a lab coat-like jacket. His hollow mask remnants form a thin upper jaw that encircles his forehead like a circlet. Despite being a Número, Tesla's power rivals that of a captain, as he blocked Chad's Diablo attack and severely injured Ichigo while in a weakened Bankai state.
Tesla greatly admires Nnoitra, even mimicking his master's eyepatch style. This admiration is evident when he shields Nnoitra from Chad’s final assault, despite criticism from Nnoitra himself. During Nnoitra's fight with Ichigo, Tesla is instructed to restrain Orihime and later to finish off Ichigo. He mercilessly beats the weakened Ichigo until Kenpachi Zaraki intervenes, badly wounding Tesla. Later, Tesla is seen on the ground in his unreleased state, shedding a tear for the fallen Nnoitra.
Tesla's zanpakutō is named Verruga (牙鎧士（ベルーガ）, Berūga), which translates to "wart" in Spanish and "tusked armored warrior" in Japanese. He releases it with the command "crush" (打ち伏せろ, uchifusero). In its sealed form, it resembles a rapier with a chakram embedded in the blade just above the hilt. Tesla can solidify the ring at will, as shown when he blocks Chad's attack with the solid ring and then converts it back to a hollow one. The guard appears to be made of scaled ribbing. Upon release, Tesla transforms into a large, warthog-like creature. His mask grows to cover his entire face, producing tusks and growing his hair into a mane. In this form, a large scar covers his right eye where his eyepatch would be in his unreleased form. Tesla relies on brute force to overpower his opponents in this released state.
