TV-Series
Description
B't X is a fictional mechanical life form from the Japanese manga and anime series created by Masami Kurumada. The character is classified as a kirin-type B't, a design that incorporates bull-like horns and a metallic, equine body structure. Once recognized as the most powerful B't within the Machine Empire's forces, X was eventually decommissioned and abandoned in a scrapyard.

The character's reactivation occurs when the protagonist, Teppei Takamiya, sheds blood onto X's damaged frame during an assault by Empire forces. This blood creates a symbiotic bond through a device known as the BreakHeart, which is the standard power source for all B'ts and requires human blood to function. Because Teppei had previously received a blood transfusion from X's original owner, a warrior named Karen, the bond is successfully formed.

In terms of personality, X initially exhibits arrogance and dismissiveness toward Teppei, viewing him as weak and prioritizing self-preservation over collaboration. The character is described as headstrong and stubborn, which leads to frequent clashes with the equally brash Teppei during their early encounters. X's original distrust of humans, born from its experiences within the Empire, creates significant friction in the partnership.

The character's motivations evolve considerably throughout the narrative. Initially motivated primarily by survival and a desire to locate its original owner Karen, X gradually develops a genuine loyalty to Teppei. This transformation is cemented after a critical battle where X is severely damaged while protecting Teppei, an event that leads to its reconstruction by the Spirit General Hokuto and the B't Max. This near-death experience fundamentally changes X, transforming the reluctant alliance into a relationship of mutual devotion.

Within the story, X serves as Teppei's primary partner and means of combat against the Machine Empire. The character enables Teppei to travel through hostile environments and engage enemy B'ts in aerial combat. X's role extends beyond simple transportation or weaponry; the character functions as an equal partner, with the effectiveness of their combat abilities depending entirely on mutual trust and synchronization. The pair develops signature combination attacks, including the Break Heart technique, which merges Teppei's energy with X's systems.

X's key relationships center primarily on Teppei and Karen. The bond with Teppei is characterized by its growth from reluctant necessity to inseparable friendship, with the pair being described as buddies whose interdependence is symbolized when Teppei uses his bandanna to temporarily mend a loose joint in X's leg. The relationship with Karen, the original owner, establishes X's backstory and provides motivation for its early actions. X also forms connections with other Spirit Guardians who become allies, including Hokuto, who is responsible for rebuilding and upgrading the character after its near-destruction.

The character's development arc follows a trajectory from discarded weapon to loyal guardian. X begins as a detached war machine concerned only with its own preservation but gradually embraces a role as protector committed to humanity's survival. This development embodies themes of resilience and redemption, with the character learning to trust and value its partnership with a human. By the conclusion of the story, particularly in the B't X Neo OVA, X has fully embraced its identity as Teppei's partner and plays a central role in confronting the ultimate B't known as Rafaello.

X possesses several notable abilities that make it a formidable combatant. The character specializes in aerial combat and can achieve supersonic flight speeds. The Prism of Aura ability is a multi-spectrum light-based attack that serves both offensive and defensive purposes, capable of melting enemies upon contact. X is equipped with a Guard System that shields its rider from environmental hazards including the vacuum of space, extreme heat, and crushing underwater pressures, though this requires sustained physical contact. Through the Battle Gear command, X can generate protective armor for Teppei, enhancing their combat effectiveness. After its reconstruction by Hokuto, X gains dormant wings that enable high-speed flight and upgraded system capabilities. The character can also generate sonic attacks through its vocal apparatus, similar to other B'ts. X's power is directly linked to Teppei's willpower, making their emotional bond a critical factor in combat effectiveness.