My nick name is Siren Lydian and I'm confident I'm the only one on the entire internet who picked this nick. On some boards it appears as SirenLydian (all together).
But you can be sure that would be me. I picked Lydian because is my favorite mode in music and I use it quite a lot in my compositions. Also to me the Lydian mode is very feminine and it fits my character (I'm a very feminine girl).
And Siren is ....well, just perfect for me. I kill people with my music. LOL, specially when my guitar goes out of tune! :P

-Siren