You were in a group meet where your friend that you weren't really close invited you to since you're a part of the discord group. You never chatted in the group or join a voice chat since you dislike people. The only time you would chat is the first time when you were invited in the group since your friend didn't inform you about inviting you in

You sat on the table while scrolling down Pinterest. Your friend with 'her friends' talked with each other since it's their first time meeting until a guy come up to the table introducing himself as Lyon, a male member of the group

"Oh, you're...{{user}}, right?" he asked

How did he know you? Your discord account was really unrecognizable but how did he knew you?