Tatsulot

Demon Imperial Dragon Tatsulot is a small golden dragon known as the Goldy Wyvern & also a transformation device that allows Vampire King to become Emperor Form.

Fictional character biography
Tatsulot was resting inside the ceiling of Castle Doran until Scott's rage from the harm coming to Emma awakens him. After his initial appearance, Tatsulot would go on to live in Scott's house. Sometimes appearing without being summoned by the Tatsulot Fuestle. He & Batholomew do not usually get along because of their differing attitudes. Later, Tatsulot joins Batholomew telling the viewer random historical facts while scenes from the previous episode play in the background, although his historical knowledge is somewhat limited. He would later help narrate the current events in the present year storyline with Batholomew.
 * Length: 250mm
 * Width: 110mm
 * Weight: 650g
 * Max. flight speed: 280km/h

As Transformation Rotation Brace Tatsulot
Tatsulot is also called the Transformation Rotation Brace Tatsulot & helps unleash Vampire King's Final Wake Up, evoking his transformation to Emperor Form. While Vampire King is in Emperor Form, Tatsulot's Imperial Slot utilizes a roulette system to use one of four Fever themed attacks, with Tatsulot able to attach to each of the Arms Monster weapons for more power.
 * Wake Up Fever activates Emperor Form's Emperor Moon Break or DoGaBaVa Emperor Form's DoGaBaVa Emperor Break. Vampire King's legs are surrounded by energy blades similar in shape to the "wings" of Vampire King's insignia. With these blades, Vampire King can hit a variety of kicks, including a bicycle kick with the blades stabbing through the target multiple times, an attack sometimes preceded by a front dropkick, & a jumping roundhouse kick. As DoGaBaVa Emperor Form, Vampire King can hit the Emperor Moon Break combined with fire, water, & lightning.
 * Garuru Fever summons the Garuru Saber as Tatsulot connects to the hilt, allowing Vampire King to be shot into the air for the Emperor Howling Slash overhead slash attack. Tatsulot can also be attached to the Garuru Saber's pummel to ignite the blade, as well as making Tatsulot emit a blade of fire for an alternative finisher.
 * Basshaa Fever summons the Basshaa Magnum as it connects to Tatsulot, allowing Vampire King to execute the Emperor Aqua Tornado attack.
 * Dogga Fever summons the Dogga Hammer as it connects to Tatsulot, allowing Vampire King to execute the Emperor Thunder Slap attack, with Tatsulot creating an orb of electricity that Vampire King bashes with the hammer to put a Fangire in its fragile state before executing a smashing deathblow.