Before Keith became the Red Paladin, he was an orphaned at a young age because his mother, Krolia left Earth when he was an infant to continue her mission with the Blade of Marmora, and Keith's Father died when Keith was very young. Keith never knew anything about his mother; the only enigmatic connection to his past that remained with him was a small blade inscribed with a strange glowing Blade of Marmora emblem that he kept wrapped up.

At some undetermined point, Keith met Shiro, and eventually enlisted as a cadet of the Galaxy Garrison, becoming a classmate of Lance and possibly Hunk.

During his time as a cadet, Keith was considered to be the best pilot of his generation and Lance claims they had a rivalry, but the prodigal pilot was ultimately expelled from the Garrison due to "a discipline issue" according to Commander Iverson. He retreated to the desert to search for a purpose and consequently felt the energy emitted by the Blue Lion, leading him to remain there and investigate the surrounding caverns full of lion carvings.

Season One