Tokuro Asahina/Kamen Rider Zeronos

Backstory: Tokuro is the older brother of Mikuru Asahina and a good friend of Ryan Tennyson. When he heard that Ryan was in coma because of Union Academy, he swore to destroy them along with S.O.S. Brigade, but for some reason, only his sister remained. He also has a crush on Velvet Scarlatina as he saved her from Team CRDL. Now he seeks to rescue her from the clutches of Union Academy and help Shin Alien Dino Thunder Force against the fake heroes once and for all as he has Deneb by his side.

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Nolan Hunter/Red Robin

Backstory: Nolan Hunter used to be the boyfriend of Weiss Schnee, but she betrayed him by cheating on him with Neptune. He then started becoming a vigilante known as Red Robin as he hunts down each villain or fake hero to show what a human is truly capable of. He joined Ben Tennyson and his group to take back what's right. Now he's ready to exact his vengeance on Weiss and show that powerless people can become heroes as well.

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Deborah Andru/Mega Soldier

Backstory: Deborah Andru was orphaned ever since her parents died to the recklessness of Overwatch. Suddenly her ancestor Kiva gave her a mecha based on her Mega Soldier, and trained her to fight evil villains, crimes, fake heroes, etc. When she was wounded in the battle against Arthur Watts, she was rescued by Ben Tennyson, his family and Shin Alien Dino Thunder Force. They helped her to repair her mecha, and now she joins to fight Union Academy, villains and others to take back what's right.

== Main Antagonist ==

Sentinel Prime

Description: Sentinel Prime used to lead the Autobots until he showed his true colors and betrayed them as he seeks to wipe out all organic lifeforms. He seeks to conquer the world as he plans to make sure nobody will stop him, especially his archenemy Grimlock.