Bell Cranel is a young human adventurer with distinctive white hair, red eyes, and a rabbit-like appearance often perceived as cute. He wears lightweight armor over a brown coat featuring a black patch above the right chest, a black shirt, black pants, and brown boots.
Born to members of the Zeus and Hera Familias, Bell was orphaned after his parents' defeat by the One-Eyed Black Dragon. His mother entrusted him to Zeus, who raised him as a grandson in a remote mountain village. There, Bell developed a passion for hero tales told by his grandfather, fueling his aspiration to become a hero. A near-fatal encounter with a goblin, from which his grandfather saved him, shaped his early life. Following his grandfather's presumed death, Bell traveled to Orario, facing rejection from multiple Familias before joining the newly formed Hestia Familia.
Personality-wise, Bell starts as humble, shy, and driven by heroic ideals, initially motivated by romantic relationships and starting a harem due to his grandfather's advice. This shifted after Ais Wallenstein rescued him from a minotaur, making him fall in love with her and resolve to become stronger to stand beside her. The incident instilled a temporary fear of minotaurs, overcome while still Level 1. His defining kindness and compassion lead him to risk safety for others, including former adversaries like Mord Latro or the sentient monsters called Xenos, earning widespread respect and affection. His trusting nature results in betrayals, such as financial exploitation by Naaza and Lili, yet he refuses to abandon those in need, ultimately forging strong alliances. Bell struggles with self-doubt, believing himself unworthy of romantic attention, contributing to his obliviousness to the affections of multiple women, including Hestia, whom he views solely as his goddess. He is notably unable to lie or keep secrets but possesses a keen ability to read others' emotions.
His character evolves significantly through conflicts. Protecting the Xenos led to ostracism as a traitor in Orario, prompting a commitment to create a world where humans and monsters coexist. Guided by Fels, he adopts a "hypocrite" philosophy, fighting monsters while advocating for sentient ones. After his defeat by Asterius and ascension to Level 4, he becomes calmer and more focused, channeling his growth into defeating Asterius and achieving broader heroic goals. Rejecting Syr's confession (later revealed as Freya) triggered a city-wide conflict, making him more cautious about handling others' feelings afterward.
Bell's abilities feature rapid growth despite being initially deemed "talentless." His unique skill Liaris Freese accelerates his development based on the intensity of his feelings for Ais, allowing him to exceed stat limits (achieving SS/SSS ranks) and granting immunity to charm effects. This results in physical prowess surpassing his level; even at low levels, he defeated higher-level opponents like Hyakinthos (Level 3) and Aisha (Level 3), and matched mid-Level 4 adventurers upon reaching Level 4. His agility rivals higher-level veterans. Upon reaching Level 5, his cumulative stat gains equate to an additional level, enabling him to spar evenly with Ais (Level 6) initially.
His combat capabilities include the Argonaut skill, charging attacks or movements for increased power at the cost of stamina and focus. Full charges take four minutes and can destroy weapons or injure him due to recoil. He innovated a "dual charge" for simultaneous attacks and combined Argonaut with his instant-cast magic Firebolt to create techniques like Argo Vesta, unleashing massive heat and shockwaves. His development abilities are Luck (enhancing item discovery and fortune), Abnormal Resistance (nullifying poisons), and Escape (boosting fleeing speed). His specialized skill Ox Slayer increases effectiveness against bull-type monsters.
Aliases reflect his progression: Little Rookie at Level 2, Rabbit Foot at Level 4, and Regulus Arne at Level 5. He is later revealed as the reincarnation of the ancient hero Argonaut.