Sean Cw Johnson is best known to fans of the Power Rangers franchise as Carter Grayson, the fearless and determined Red Lightspeed Ranger from Power Rangers Lightspeed Rescue (2000). As the leader of the Lightspeed Rescue team, Sean portrayed a heroic firefighter-turned-Ranger who exemplified bravery, leadership, and an unwavering commitment to protecting humanity.

Lightspeed Rescue was notable for being the first season where the Rangers were government-employed emergency responders, a unique twist in the franchise. Carter’s character was admired for his strong sense of duty and self-sacrifice, which Sean brought to life with intensity and heart.

He reprised his role in:

• "Power Rangers Time Force" (2001) during a special team-up episode titled "Time for Lightspeed"

• "Power Rangers Super Megaforce" (2014), appearing in the Legendary Battle episode, a massive crossover celebrating past Rangers.

Sean Cw Johnson’s portrayal of Carter Grayson left a lasting mark on Power Rangers history. His character remains a fan favorite, often cited as one of the most capable and inspiring Red Rangers of all time.