Yeon Dongha, legitimate heir and younger paternal half-brother of Hajun Yeon, belongs to the prominent Yeon conglomerate family. Raised apart from Hajun in a separate residence, he endured rigorous successor-focused education from early childhood, embedding values of dominance and superiority. Physically fourteen years old and 157 cm tall, he has blonde bowl-cut hair, light grey-green eyes, and a mole beneath his left eye. His luxurious yet thematic attire includes a dark green jacket with gold insect-shaped pins, a black turtleneck, harness-like straps, grey shorts, multiple rings, a gold chain necklace, and hoop earrings. He wields the Majestic Wand, a bird-headed cane acting as his Phantometal, activated by kissing its handle. Dongha displays arrogance, sadism, and a deep-seated inferiority complex toward Hajun, fueled by perpetual comparisons from family and associates. At age ten, he recognized these comparisons; by twelve, he learned his father valued Hajun’s abilities over his, intensifying his resentment. This drives his pursuit to surpass Hajun through hip-hop—a genre he chose independently despite familial contempt for its "vulgarity." His trauma surfaces in hashtags like #UnderPressureOfPedigree, #CrossbreedInferiorityComplex, and #WorthlessIfNotWinner, reflecting his conviction that only victory justifies existence. His disciplined daily routine includes international school academics, followed by evenings dedicated to "Business administration studies" and "Hajun Countermeasure Meetings," culminating in "disciplining" his butler, Chungsung Baek. Chungsung, AMPRULE’s co-member, serves as Dongha’s caretaker, track producer, and emotional anchor. Though Dongha dismisses him as "arms and legs," he critiques Chungsung’s occasional failure to interpret his intentions. Their relationship features ritualized punishments, which Chungsung enjoys, reinforcing Dongha’s authority. Through AMPRULE’s Paradox Live participation, Dongha aims to crush Hajun’s team BAE and assert supremacy. He derides BAE as "a team in name only" with shallow bonds, vowing to "erase peasants into dust" via music. Yet after AMPRULE loses to BAE in the "FATE" round, Dongha accepts defeat gracefully, openly and without bitterness. This reaction—paired with Chungsung taking him to a candy apple stall tied to a childhood memory of Hajun—exposes unresolved vulnerability. Contradictions define his character: he scorns Hajun as a "stray dog" yet clings to their sole positive encounter, where an unrecognized Hajun comforted him post-paternal scolding. The candy apple, symbolizing that moment, remains his favorite food, hinting at latent longing for connection beneath his vindictiveness. He also exhibits height-related anxiety, navigational incompetence, and pursues piano as a hobby.