Seiji Usami
Computer nerd who assists the Blue SWAT in their Blue Research group after he was saved by them. He had originally been listening in on the Blue SWAT headquarters, and quickly contacted the three survivors after their base was destroyed. After they saved him from an Alien which had possessed his boss, he began working with them as their analyst and guide for missions.
Sumire Asou
Loudmouth who joins Blue Research as their secretary. She is the only one unaware of her employers role as Blue S.W.A.T.
Gold-Platinum
A friendly alien who appears late into the series. After giving Shou a special weapon that allows him to upgrade into "Hyper Shou", he becomes a member of the team.