This person is named Yuu Isogiashi, the newly made Name game mechanic tells you so. It seems the amount of Game Mechanics is increasing to more than one per person, perhaps some Investigation is called for? Perhaps Yuu should try Googling it?

Yuu has already made crochet plushes! He keeps them in his hat as his skills with his Inventory could definitely use some Training before handling such precious items. They are modeled after his friends and many are unseen deep within his hat.