How to search users?

[___]

My friend told me her nick on CS, but I don't know when she joined, so there's any way to find her without looking up fot 10000000+ pages D: ? Please, reply, that's important for me!

And yeah, I've tryied to search in forum by her name, but she's COPPA'd.

[the.kitsune.prince]

Go on search, and type her nickname

[c h r i s t m a s]

go to trades and click serch and put her name is

[Ricorn]

Click Members (upper right corner) - 'Find a Member' (top of the list) - enter the username.