So your "friend" claims to be a Japanese cosplayer named Reiko. So that's a girl.

I don't see a reason to doubt her so far. It's not like she claims to be a celebrity or anything. When a bunch of people make themselves up to look that particular way it wouldn't be surprising to have seen someone else who looks like that. Personally I'd rather trust someone who I've had real personal conversations with over a bunch of people on some J-Rock community. Just don't go out and meet that person or give them too much personal info until you're absolutely sure of her identity. You could try asking for a full body shot without the cosplay, but that may sound weird.

And though this might sound a little wrong, but how is that person's english? If it's perfect American english, I'd start to doubt the person.

But hey they could be Japanese American.
