lets see, my chars were all pretty based on stuff i was checking atm lol
there r no real reasons except for my GM.
Epica - when i was logging in it came to me, server was Epic...so i translated it to my language but to the female noun so it became Epica.
Claw - i felt like it cuz i was thinking at the time i would Claws to be 5.0 to farm etc...(there was no 5.0 and name was decided while selecting char name)
Noctis - obviously the main character of the announced Final Fantasy XIII Versus, which now was announced on E3 beeing transformed into Final Fantasy XV
Caius - Final Boss of Final Fantasy XII-2 (reading in english means Chaos)
Serah - Final Fantasy XIII-2, Lightning's Sister
xTViruSx - reference to the well known T-Virus from Resident Evil
EvilTouch - i use this for a long time. its mainly related to Resident Evil.
thats it