Ippei Mine, identified as Mark Gordon in Philippine adaptations, is a Japanese-American orphan. His mother sacrificed herself to save him from wolves during his childhood, an event he long misinterpreted as abandonment, fueling enduring bitterness and emotional detachment. Forced into self-reliance, he survived through street life and odd jobs until discovering purpose in rodeo. There, he mastered horsemanship and whip techniques, forming his deepest bond with a white stallion named Eiffel, whom he described as "like a mother"; together they won multiple championships.

Physically, he is tall and slender with a muscular build, featuring neck-length black hair and dark eyes. His attire as a Voltes Team pilot is a blue uniform; casually, he favors cowboy-inspired clothing: a brown vest, button-up shirt, jeans with tassels, and a pendant necklace. Later live-action depictions show him with short hair featuring fringes and wearing an armored tunic with a blue gem or Lieutenant-ranked combat uniforms.

Personality-wise, Mine presents as aloof, cynical, and conflict-prone, frequently clashing with team leader Kenichi Go due to opposing worldviews, sometimes escalating to physical confrontations. Despite his abrasiveness, he maintains composure during crises. His relationship with Megumi Oka involves mutual teasing, protective instincts, and implied romantic interest, though he occasionally uses flirtation to deflect emotional vulnerability.

Recruited forcibly into the Voltes Team, he pilots the Volt Bomber, which forms Voltes V's arms. Initial reluctance stemmed from separation from Eiffel, though the horse was later brought to Camp Big Falcon to aid his integration. His character arc involves reconciling his traumatic past: after Professor Hamaguchi reveals newspaper evidence proving his mother’s self-sacrifice, he experiences profound remorse, apologizes at Mitsuyo Go’s grave, and softens his hostility toward teammates. This fosters deeper loyalty and commitment to defending Earth.

Expanded media, like the live-action series *Voltes V: Legacy*, emphasize his Filipino-American heritage and explore romantic subplots. Here, he pursues Jamie Robinson with gifts and gestures, leading to a relationship that dissolves due to unresolved feelings between Jamie and Steve Armstrong. His military role expands, including missions to rescue Boazanian slaves and confrontations with antagonists like Marquise Zaki. Additional lore identifies Hamaguchi as his maternal grandfather, and he appears in video games such as the *Super Robot Wars* series.

His thematic narrative centers on overcoming isolation through trust, reflected in key quotes like "Happiness has value because you find it for yourself," marking his journey from bitterness to belonging.