Kosei Hoshimi is the human host and main protagonist associated with Ultraman Omega in the series Ultraman Omega. He is a central figure who becomes connected to the Ultra warrior and takes on the role of protecting Earth from powerful threats. As the story’s lead, he balances ordinary human life with the responsibilities of a hero, often serving as the audience’s entry point into the series’ mystery, action, and emotional themes. Ultraman Omega is the powerful giant form he can embody in battle.