Apply the simple toothpaste (not gel) on your couch and rub it gently. Then clean it with a clean cotton cloth. I hope it will be removed. If still it stays then you can apply vinegar or alcohol to remove it.
How Can You Get Permanent Marker Off A Leather Couch?
Tried toothpaste on it got most of it off then used vinegar and now you can't see it at all :)