Make a short character name using OpenKore

Make a blank ID then set the config of you're openkore like this

master YourServer
server
username YourUsername
password YourPassword
pin
char
sex

And blank the rest ( server , pin , char , sex )

Then after that run wxstart.exe it will ask you to give it the detail of the character

Fill it Like this

0 " V " 9 9 9 1 1 1

and logged in with your client.. see your character name only V ( one character )
And you can make two or three word too using this.. LoLx