Give Hyde´s physical and pychological features

Hyde is the dark side of Dr. Jekyll. He is a thoroughly amoral individual. He exists to quench his darkest desires and impulses. Here is a description,

"He is not easy to describe. There is something wrong with his appearance; something displeasing, something downright detestable. I never saw a man I so disliked, and yet I scarce know why. He must be deformed somewhere; he gives a strong feeling of deformity, although I couldn't specify the point. He's an extraordinary-looking man, and yet I really can name nothing out of the way. No, sir; I can make no hand of it; I can't describe him. And it's not want of memory; for I declare I can see him this moment." (p.15)