This came up last night and the person I was playing against couldn't believe it.
My opponent has no defending characters. I have a Repair Droid out that is not focused. I delcare him as a attack. Focus to strike, deal no damage but then do my one unopposed damage. That is doable correct? I checked the rulebook and it says nothing about not being able to attack if you don't have any damage icons, that you just need to attack with a ready unit.
It makes no sense in real life but then again card games are not real life