Solaris accompanied Kannagi and Katal on their mission to recover the SOLU from the meteorites that crashed to Earth. Despite encountering resistance from the Seven Legendary Kamen Riders, they were able to successfully obtain the substance. However, as they were transporting it they were intercepted by Shotaro Hidari as Kamen Rider Joker. Following another struggle with the Kamen Riders, they lost the SOLU when it was knocked into a sewer.
Solaris was destroyed by Kamen Rider Double CycloneJokerXtreme's Bicker Charge Break Maximum Drive.
- Despite being shown to have been modified into a Mutamit, Solaris never assumes a Mutamit form like Katal and instead uses a Zodiarts Switch to transform into a Zodiarts.