Tsuji prototype

The Tsuji prototype (辻原型) was a creation of Kagura. It was the precursor to the Tsuji race and expressed the power of a, and  in one body. Aside from testing Kagura's racial research its mission was to capture Shiju Shūdō alive for Kagura's experiments. Its mission was a partial success; it showed the validity of the Tsuji as a race, but was defeated by Yoshiaki Hiroshi before it could capture Shiju.

Appearance
Kagura's prototype had the outer appearance of a with a vague humanoid shape. It possessed a long, thin, cylindrical-shaped head with no discernible features. Its ears appeared to be wing-like protrusions, its fingertips where sharpened claws, and a series of spine-like extremities ran from the base of its neck down the length of its body to the tip of its long, thin tail. Its legs and feet where muscled and it possessed only three toes.

Personality
The Tsuji had enough presence of mind to incapacitate the instructors of Shiju's class before attempting to capture him. When faced with Yoshiaki it deduced the latter to be its primary threat and attacked him with great ferocity as a result. The fact it was capable of following a pre-defined mission implies some intelligence, though it appeared to operate mostly on instinct.

Synopsis

 * Main article -- Bleach (Kenji Hiroshi).

Part I

 * Main article -- Bleach: Sun and Moon Chronicles.

Machinations arc

 * Prototype Unleashed

Equipment

 * Reiatsu-Concealing Cloak: Shiju noted the creature was wearing a cloak. This enabled it to sneak up on the instructors of his class without them realizing, but was lost when it clashed with Yoshiaki; it was only after this that Yoshiaki could sense its presence.

Powers and Abilities
The latter also deduced that fighting the creature was like fighting a Shinigami, Hollow and Quincy at the same time, as it's reiatsu contained elements of all three.

Enhanced Durability: The prototype did not possess a weapon of any kind and instead intercepted Yoshiaki's strikes using its arm and tail, seemingly without injury or pain.

Enhanced Speed: The prototype was capable of incapacitating a number of academy instructors with little effort before they could even register its presence. It was then capable of pressuring Yoshiaki during their battle with the speed of its movements.

The Cero backfired upon it however and destroyed its body.

Behind the scenes

 * The events surrounding this prototype are similar to those surrounding in the Bleach manga.