What's this guy's name again?

Up to another ride of riddles anon? Riddle me this!
>I divide safety from danger, silence from storm.
>I stand still, yet decide who passes and who stays.
>I can be broken, locked, or left ajar.
What am I?

Riddle me this anon!
>I follow you, yet never speak.
>I vanish in darkness, though light makes me sleek.
>I copy your form, but I am not you.
So tell me, what fades when you do?