Christopher Thorndyke

Christopher Thorndyke is a main and supporting character of the Sonic X anime series. He is the son of a wealthy father and mother, however he is very lonely due to the fact that his parents are always busy.

Chris met Sonic when the hedgehog was drowning at the bottom of Chris' family pool (due to the fact that Sonic cannot swim). After befriending him they went on multiple adventures together and had a practically unbreakable bond. Eventually, when Sonic had to go back to his homeworld to prevent the two dimensions from merging, Chris turned off the portal before Sonic could go in and ran off with him, unwilling to let his new friend go. Chris had some sense talked into him by Sonic and he was last seen being carried off by Sonic back to his parents before Sonic went home.

6 years later
Chris, now 18 and a genius inventor, went to Sonic's world through another portal, but when he arrived, he was suddenly trapped in his 12 year-old body. It was soon explained that time was different in Sonic's world so in other words 6 years in Chris' world was like 6 months in Sonic's world. Chris' mind was unaffected by the change and his intelligence played a big role in the battle against the Metarex. After the Metarex were defeated, Chris realized he had to go home or the barrier between the worlds would collapse and Chris would be stranded there forever. Eggman, despite being his enemy, built a pod that would bring him back to the human world. Chris said one final goodbye to Sonic before returning to the human world for good.

Trivia
Chris is often disliked by American and European audiences because it's believed he took Tails' role as Sonic's sidekick and stole Amy's role in redeeming Shadow the Hedgehog in the Sonic Adventure 2 arc and having more screen time than all the other characters, including Sonic.