Thank you. Natsuko and Ai-san are two of the best cosplayers I know. They always look so fantastic and beautiful. They're quite famous too though Ai-san always tell people that she's not a cosplay idol even though a number of people think she is.
Well I'm pretty sure Natsuko is a cosplay alias. A lot of people don't use thier real names. I think "Ai" is her real name but I just add 'san' cause she won't tell me her age so I don't know if i can call her just by name or if i need thai version of honoriffics to use with her so I either call her "Khun Ai", or "Tan Ai" which is like Ai-san or Ai-sama, and i alternate between using the thai and japanese honoriffics when i talk to her but it makes more sense to use the japanese version when talking about her in english somehow. I think she's older than me though. Just not sure by how much.
I don't use an alias too, but the name is very close to my real name, it's only different in pronounciation. Like I normally use the name "Ry" but in cosplay community I use "Raii-kun". Just the 'i' at the end is more pronounced. Sounds kinda pretentious but it makes sense in context hehe.
I have a couple of names floating around at this point actually. It depends on who you ask, but if you meet someone new at a con and introduce yourself by that name, then start there you can change it at least for some people if you want to i imagine.
Ah well for me it's mixed, some still call my by my real name and some call me by something entirely different. Some just call me Renji. And there's one girl that calls me the wolf royal guard... also some call me Liutenent. It really depends.