Cam is one of the first three characters encountered in Rhythm Heaven Fever. To be exact, he's the second character ever met in the game (Rhythm Girl being the first as seen the title.), with Marshal and Miss Ribbon appearing after him, respectively. He is silent in the game and is not known to be able to speak. The only noise Cam ever makes is a glad "Hmm!" when you press A + B in the Rhythm Test. Oddly enough, Cam never speaks with a speech bubble.
Cam never speaks in the game but rather makes emotions during the Rhythm Test signaling the player either missed the beat completely, near perfect, or perfect. He also appears as a non-playable character in Night Walk, the credits for Rhythm Heaven Fever, appearing to have trouble following Marshal and Miss Ribbon.