Sun is a sun-themed jester animatronic working as a daycare attendant at the Superstar Daycare run by Fazbear Entertainment. Sun has two brothers named Moon, a moon-themed jester animatronic, and Lunar, a small also moon-themed animatronic who is way too innocent for this world. Sun, Moon and Lunar's enemies are Eclipse and Bloodmoon. Eclipse wants to torture everyone, and Bloodmoon is a homicidal maniac who wants nothing but death and blood. Sun killed Bloodmoon once, but regrets it.