|Manga Debut||Chapter 266|
|Anime Debut||Episode 195|
The Storm Tyrannosaurus is a Storm-attribute Box Weapon that merges the body of its user with the power of the Tyrannosaurus through a Carnage Box. Using the latest technology, the Millefiore Famiglia was successful in embedding Boxes in the human body. A theory goes that there was no choice but to imbed the Box inside a body. The reason was that the Box's power was so extreme that its performance is not stable when the Box is by itself. At any rate, it is a Box Weapon that conceals an amazing fighting power.
Through this Box of Carnage, Zakuro becomes a hybrid between human and Tyrannosaurus Rex that has Storm Flames flowing out of his shoulders. In this state, not only his size and physical abilities are increased, but his skin becomes far more resistant, to the point of being called impenetrable. He also has regenerative abilities strong enough to recover lost limbs, although it has been noted he cannot do it as fast as his fellow Daisy does.
- Magma Infiammato: One of Zakuro's offensive techniques when in this state. He releases a jet of Storm Flames similar to magma from his hand.