Stellan, born First, is a young adolescent Polar Bear, or Ursus maritimus, belonging to the Clan of Sven, from whom the descendants of Svenka were from, including Stellan. Stellan is said to be a powerful swimmer, though often seems far much less energetic and impulsive than his sister, Jytte. Unlike Jytte, Stellan often takes time to think these things through and can occasionally believe his sister to be somewhat ignorant at times, yet also admires her for the same reasons. He is also a riddler, a bear granted with the strange ability to 'riddle' the minds of other creatures.
The son of Svenna and the rebel leader Svern, Stellan and his sister were initially raised by their mother alone, but were later entrusted to the care of Taaka, his distant cousin, after his mother offered her own freedom in exchange for her cubs safety. Taaka however, soon proved to be an abusive guardian and forced Stellan to go by the name of Fourth, despite Stellan being older than her own litter of three children, eventually causing Stellan and his sister to run away and take their names from a set of constellations, just as their parents had. Along with Third, and later, Froya, their distant cousins, Stellan and Jytte eventually found their father, Svern, and trained under him in the art of combat for a period of time before retrieving the Key to the Ice Clock from the Den of Forever Frost. The four cubs subsequently then travelled to the Great Tree, where they were tutored by Otulissa in various studies, then set of in an expedition throughout the various territories of the Southern Kingdoms to recruit various allies against the Timekeepers of the Ice Clock, which Stellan was directly responsible for as the diplomat of the group. He currently resides in the Great Ga'Hoole Tree with his sister, Froya and Third after being reunited with his long-lost mother, Svenna, readying to join the fight against the tyrannical Timekeepers of the Ice Caps.