Pieyon

Pieyo is a supporting character in Oshi no Ko. He is a famous physical training Youtuber affiliated with Ichigo Production, Inc. Pieyon is a muscular tanned man wearing a cute bird mask, which was a character from an unnamed TV show presumably named Pieyon. Later on, we see his unmasked figure, and it is revealed that he has black hair. Pieyon first appeared in costume and maintaining his "Pieyon" voice for the entire shoot, suggesting that he is focused on his work.