Number Two is a member of the Kurosu family in the anime Beyblade X, first appearing alongside the rest of the clan when they step forward before the masked Blader X after he rises through X Tower. In Japanese materials her name is written as Kurosu Tsū, and English releases render it as Two Cross. She is the second-born sibling of the Kurosu household and therefore one of the relatives who confronts the protagonist Ekusu Kurosu, who battles under the identity of the masked X. Her presence is defined by a warrior-like bearing that she uses to break the spirit of opponents she considers weaklings, and she carries herself with the deliberate posture of a trained fighter.

Personality and motivation are closely linked for her. She is stern, strict, and treats Beyblade battles as genuine combat rather than entertainment, an attitude that translates into aggressive, overwhelming performance inside the stadium. She shows a caring side as an older sister to Nine, another member of the Kurosu family, and her concern for Nine is visible even in tense situations. At the same time, her loyalty to Zero is fixed and unshakable, and it guides most of her actions. Her stated intent is to crush everything that stands before her, and she devotes herself to the ambitions of the Kurosu clan rather than seeking personal fame.

In battle, Number Two uses Rocket Griffon H as her Beyblade. Her fighting approach reflects her warrior philosophy: decisive, forceful, and built around overwhelming opponents in open combat. Her role in the story is primarily that of a formidable opponent representing the Kurosu family's power, serving as one of the obstacles that the masked X and his team must face as the series moves into the conflicts surrounding his bloodline.