Racer X is a fictional character from the popular anime and manga series Speed Racer, created by Tatsuo Yoshida. He is known for his exceptional racing skills and mysterious persona, often wearing a distinctive white helmet and racing suit. Racer X is actually the older brother of the main character, Speed Racer, who is unaware of his true identity for much of the series. In the story, Racer X competes in various races, often helping Speed and his friends while also pursuing his own goals. His character embodies themes of loyalty and sacrifice, as he often puts himself in danger to protect others. Racer X's complex backstory adds depth to the series, making him a fan-favorite among viewers.