Phil Anderson. Very hairy indeed.
Phil is the brother of Rat, and is eternal as the hills and the sun. Although I've known Phil for quite a few years now, he seems eerily changeless. I've seen him in the daylight, so I don't think it's anything to do with being undead or anything.
He wears shoes a lot more regularly than he used to, so that's a change of sorts. He does, however, insist on using the repellent and archaic Program Manager, that left-over sewer-slime from Windows 3, even though he works every day in Win98. He's also one of the Lords of the Land of Dress-Up (the S.C.A.); maybe the two things — the medievalism and the irrational clinging to archaic and obsolete technologies — are related.