Wabii, a large, obese male, forms an inseparable duo with his twin brother Sabii. Their near-identical appearances feature matching pink vests, blue shorts, golden wristbands, and blue-green helmets adorned with yellow eye markings, differentiated only by the number of helmet ponytails and forehead dots. The twins speak in eerie synchrony, balancing cooperation with rivalry—Wabii never hesitates to unleash full force when prized cards hang in the balance.

As Battlers of Darkness members, they first ambush protagonists Shunta Mogami and Yoku Albatrosa, demanding simultaneous duels. Wabii confronts Shunta alone but suffers defeat, forcing a retreat. Later, the pair joins comrades to seize The BoarTwelveGodKing Calamity-Boar from General Inui, only to face another crushing loss. During a faction gathering for The RoosterTwelveGodKing Gale-Phoenix, Wabii and Sabii briefly consider clashing for the card but withdraw after observing Kabuto’s overwhelming power, permitting Yoroi to claim it unchallenged.

Wabii wields a Zodiac X-Rare deck mirroring Sabii’s, stocked with cards like The MagicalTwinsDeity Geminize, The ScorpioKnight Scor-Spear, and The ShineCentaurusDeity Sagitto-Apollodragon. Their decks’ near-identical composition often leads both twins to draw matching cards mid-battle, amplifying their synchronized combat style.