Yuumi was added to League of Legends in 2019 as a support champion, a magical cat from Bandle City who attaches to allies and heals them while staying mostly untargetable. Her Brazilian Portuguese voice lines became popular with Brazil's large LoL community, who clip her cutest and sassiest lines for soundboards and edits. This ai doguinho moment spread in that scene as a short reaction sound, shared by players who main Yuumi and by creators making pet and cat versus dog jokes outside the game as well.