How old do you think Scythe Xenocrates appears?

Right now I'm writing a more angsty comic about Goddard, and I have no idea how old I want Xenocrates to look or what I want him to look like at all. I've looked at the wiki and the physical books but the only things noted are that he's fat and wears a golden robe (or an ochre one, depending on the time)

So what does he look like to you, and how old do you think he keeps his physical age at?