Flash is the son of Sonic the Hedgehog and Amy Rose. He has blue and white fur and green eyes like his father.
Hearing of a massive drill that Eggman has planned for, Ratchet gets a called from his friend Sonic for help. Upon their arrival, Raiden meets Sonic's son Flash and his friends. Flash reveals he knows about Raiden's team and desires a place on the team. However, the other members don't like Flash because he's reckless and flirts with the female members a lot. Raiden defends him by saying they were all just as reckless once and thinks Flash can change. Flash proves himself by teaming up with Bowie to rescue Raiden from falling off a cliff after the drill's practice run. Afterwards, the group changes their views on Flash and accept him as a member of the Rangers.
Flash is a fearless, bold, and heroic individual. Though reckless, lazy, and careless (like his dad), Flash is a quick reactor and always alert. He is also adventurous and has a close relationship with Raiden. He also has a great relationship with Jericho as he considers his best friend (out of universe).
On his initiation day, Flash befriends an FFBE Zinogre naming her, Fireblue.