Recover a delete player and character
Depends how you did it.
If you used one of the [Move] options, then all of the character information will have been transferred to another player, and can be copied and pasted back, once the player has been added back to the game.
If, however, you used the [Remove User] option, then all of the information is gone, and the only way to get it back is if the player had a copy of it somewhere.