Wanjirō, a male character from the Mahjong Soul universe, emerged as one of the shrine’s first inhabitants alongside Ichihime. He rejected a mysterious duty to chase freedom, earning a distinctive canine face as Kami-sama’s minor punishment. His personality revolves around valuing good fortune and tasty food as life’s essentials, fueling his enthusiasm for mahjong and enjoyment. He declares, "Yo, my friend, if you like Mahjong then take me with you. I’m sure you will benefit a lot," and celebrates leisure with, "It’s time to show true artistry! Eating ramen while surfing, play and eat at the same time, woof!"—the latter referencing his Beachside Vacation outfit.
In lighthearted shrine narratives, he appears in chibi format for mahjong matches and daily activities, interacting with characters like Ichihime and Kaguya-hime. His core traits remain consistent across the original comical shorts and sequel net animation, anchored solely in his freedom-seeking origin and enjoyment-focused philosophy. Visually, he dons multiple outfits—Default, Bond, Halloween Party, and Beachside Vacation—each reflecting his interests in food and leisure.