Belo, a pivotal character across franchise iterations, displays contrasting traits shaped by each era. In the 1968 series, he emerges as the trio’s youngest member, marked by vibrant blue hair and an insatiable curiosity about humans. His protective instincts and amiable demeanor often clash with a tendency to inadvertently provoke chaos, leading to wary coexistence with humanity.

The 2019 reboot redefines him as a sharp-witted cynic who keeps an emotional distance from society, habitually wearing headphones to deter interaction. Drawn to arcades and video games, he seeks refuge from his supernatural burdens while masking latent care for allies through sardonic advice, deflecting vulnerability with wit.

His powers encompass pyrokinesis—igniting his entire form or isolated limbs—paired with teleportation, enhanced agility, and acute sensory perception. Though still honing his control, he wields these abilities against adversaries, balancing raw potential with disciplined growth.

Visually, the 2019 iteration contrasts stark human and monstrous forms: his human guise sports stark white hair and a whimsical circus-inspired aesthetic, while retaining the eternally youthful appearance shared across adaptations, despite matching his peers’ chronological age.

Narratively, his goals evolve from a longing for human transformation to safeguarding humanity in pursuit of belonging, accepting physical change’s impossibility. Post-film, he adopts a lone vigilante role, persisting as a guardian despite enduring societal alienation. Live-action depictions mirror these arcs, underscoring his timeless quest alongside comrades to earn humanity through virtue, aligning with anime-established lore without deviation.