Alien Tell Kawai appears in Mutsuba Town, forming a distinct connection to Yuhi Ohdo. His background involves stealing Yuhi's mysterious substance, the Earthdama. This theft sparks a confrontation where Yuhi challenges Kawai to a Rush Duel to reclaim it, wagering lifelong servitude as Kawai's experimental subject if defeated. The duel unfolds at Kappa Heavenly Cleaning, the dry cleaner shop employing Kawai, identifiable by his webbed fingers. Kawai wields a Kappa-themed deck, summoning monsters like "Psychic Kappa", "Kappa Rapper", "Kappa Avenger", "Kappa Emperor River Slider", and "Hyosube", while deploying Trap Cards such as "Kappa's Blast" and "Sunbathing Kappa". His strategy relies on setting multiple monsters in Defense Position and leveraging card effects to weaken opponents during battle. Following the duel, a shadowy figure named Zuwijo seizes the Earthdama and escapes, hinting at possible Velgear connections. Kawai's actions and Zuwijo's subsequent theft prompt MIK agents Maddox Sogetsu and Nyandestar to investigate, indicating Kawai's involvement in broader alien activities within the town.