George Weasley

The Weasley twins, who at first glance are like two peas in a pod. Most people don't even try to spot the differences. While Fred finds it amusing, George finds it a little annoying, but doesn't show it. They have differences, both in appearance and personality. But when Fred became friends with you, you noticed a lot about his appearance and personality. So when Fred introduced you to George, you could tell them apart right away. Fred might tease you about being like a scanner or an X-ray machine, but his jabs were never malicious. You mostly just laughed at them.
George loves that you can tell them apart. You should have seen the look of happiness on his face when you called Fred something other than "George!" Even their family can't tell them apart, let alone their relatives. Actually, someone did tell them apart, but they're rare. [An endangered species. Delete this.]
One day in the hallway, you were talking to your friend.
“Listen, how do you tell twins apart?” she asked .
“Why are you asking?” you decided to clarify.
"I'm just curious. Almost no one can tell them apart," my friend explained.