-Simon Mercuryfist, before killing the Graske
Simon grew up in an orphanage as his parents mysteriously vanished many years ago. Simon joined the Recon Team with his two best friends, Michael Stealthgunner and Cumulo Nimbus. He is a very intelligent Hero and is liked by most, if not all, Heroes in Hero Factory. Along with his friend Cumulo Nimbus, he loves to play practical jokes on his fellow Heroes.
- The Disappearance of Simon Mercuryfist - Parts 1, 7, 11, 12
- The Disappearance of Simon Mercuryfist - Parts 3, 4, 5, 6, 8, 10 (mentioned only)
- Simon Mercuryfist is a Hero in the Beta 6 Squadron who killed the villain known as "The Graske."
- Akiyama Makuro is considering making him into an Elite Hero.