If it makes you feel better, Thirteen's almost the only one of his brothers who enjoy a life after Four ascends the throne, though historically he was sick all the time. (Maybe from the imprisonment, maybe not.) But he and Four definitely worked together and kicked administrative butt for a while.

I feel slightly freaky, liking Four above Eight - doesn't seem to happen very often, apparently, but the breakup was so heartbreaking! So props to BBJX for making me mourn a ship I don't even OTP. *pets Eight*