Rockleton –

No one knows what kind of creature Rockleton is, or where he came from. Even his own memorys a little hazy: for years, he was just there, static, happily aware only of the rumblings of the earth.
And then one day, he just, sort of… woke up. Discovered hed had eyes and limbs all along. Figured hed explore the world on these new rock-legs. Ever since, his days are simple: walk, observe, and enjoy the scenery come rain or shine (both keep his moss looking lush).
It just shows, even those who seem unchanging can still go through something of a metamorphosis.