In addition to Elfen Lied's "Be Your Girl", I've also added...
1) Burst Angel's "Under The Sky" by Cloudica
2) Onegai Teacher's "Snow Angel" by Kotoko
3) "High School Queen" by Nami Tamaki
4) Full Metal Panic Fumoffu's "Sore Ga Ai Deshou" by Shimokawa Mikuni
5) Ouran High School Host Club's "Sakura Kiss" by Chieko Kawabe
Highly recommend them!!!
Enjoy!!!
Jean :D