Character Has Gone Missing

The server crashed and when I logged on again my main character was no longer in the list. It is the one with all my missions on 6823 in all and 177800 kills. What has happened?

I have had to add this because the edit function would not accept my amendment. The character is of course Spock_\\//_

Thank you very much, I know you have a lot of things to do, so your help is very much appreciated.