Taishakuten is one of two benevolent deities summoned from heaven alongside Bonten to aid the Thirteen Buddhas in protecting humanity from earthly vices controlled by the demon Mara. His core mission involves combating Mara's corrupting influence, which manifests as destructive emotions in humans, necessitating divine purification.

A celestial deity associated with the sun, Taishakuten is revered for his formidable combat abilities, wisdom, and leadership within the Buddhist pantheon. He commands authority with a stern, disciplined demeanor and a strong sense of duty, prioritizing others' welfare and demonstrating protective instincts toward allies like Bonten. However, his personality includes a quick temper and social awkwardness, fueling persistent conflict with the prideful and critical Bonten. This friction stems from unresolved past tensions, yet their shared battles against Mara gradually forge mutual respect and cooperation as they confront their flaws—Taishakuten's anger and Bonten's arrogance.

Though dedicated to eradicating suffering, Taishakuten sometimes employs ruthless or violent methods, creating a complex figure whose actions blur traditional hero-antagonist boundaries. His character design reflects warrior attributes, and he uses glamours to disguise his divine nature among humans. Recognized as a king of the heavens, he holds an authoritative position in the celestial hierarchy.

Personality assessments categorize him as an ESFJ type, highlighting his sociability, attentiveness to others' emotions, and responsibility-driven leadership. Concurrent Enneagram Type 8 ("The Challenger") descriptions emphasize his assertiveness, loyalty, and journey toward balancing strength with empathy. His background references connections to wrathful entities like Asura.

Across all media, Taishakuten consistently serves as a guardian deity focused on maintaining cosmic harmony against Mara's corruption, with his development centered on reconciling interpersonal conflicts and refining his approach to justice.