I can't copy only one character, I have to copy 2 and then use DEL or Backspace. That's kinda annoying.
But, if you have to type a nickname, I have a solution! When you're on a channel and you want to type someone's nick ( I assume this person is on the same channel), you should only type his/her nickname's first characters and hit TAB key. For an example, if you want to type Augux{qwerty} and this is kinda hard for you and you can't or don't want to copy, just type "Aug" (w/o quotes) and hit TAB. If another nickname appears, keep hitting till Augux{qwerty} appears. That's it, long for me to explain, but very simple to do.