Takuto Ando (Takun in his nickname), the main character of the series. He dreams of becoming an racer and having his grandfather accept him as a man. Unlike the other members of Sazer X, he is from the present day. He is seemingly in love with Remy.
As Lio-Sazer, his element is and his personal weapon is the Lio-Breaker . When the Cosmo Capsule "Lio-1" is equipped in Lio-Breaker, he can perform his finishing move, "Lio Fire".
Ad, the serious member of the group. He who does not take well to Takuto or any of the current era's Earth populace, accusing them of neglect in allowing themselves to be conquered by the Space Pirates in the past, leading to the eventual destruction of his home planet Biyodo.
As Eagle-Sazer, his element is wind and his personal weapon is the Eagle-Blaster . When the Cosmo Capsule "Eagle-2" is equipped in Eagle-Blaster, he can perform his finishing move, "Eagle Typhoon".Beetle-Sazer
Kane, the immature member of the group. He usually goofs off when they are not fighting, and is especially fond of sightseeing. However, he is a strong believer that even if he has a relaxed attitude most of the time, he comes through when he is needed the most. He is the oldest of seven siblings, and hails from the planet Rady.
As Beetle-Sazer, his element is Lightning and his personal weapon is the Beet-Hawk axe. When the Cosmo Capsule "Beetle-3" is equipped in Beet-Hawk, he can perform his finishing move, "Beetle Slash".
Commander Shark (or Captain Shark in Philippine dubbed version), the commanding officer of Sazer X. He does not travel back in time with Ado, Kane and Remy straight away, choosing to support the troops in the future before heading back himself. He eventually appears once the Neo Descal fleet arrives in the present day. He is also the adoptive father of Remy. His special Knuckle Cross is named Shark-Knuckle.
It is eventually revealed that he is half Space-Pirate, which means that the success of the Sazer-X mission would cause him to be erased from history, having never been born. Despite this, he is resolute to carry out the mission to completion.
As Shark-Sazer, his element is Water and his personal weapon is the Shark-Bash sword. When the Cosmo Capsule "Shark-4" is equipped in Shark-Bash, he can perform his finishing move, "Shark Flash".