Answer:
Always in you, sometimes on you. If I surround you, I can kill you. What am I?
I invade your home once a year…but only if you’ve been good.
I'm a ruler with 12 agents. Half of them work in the darkness. Who am I?
What has 4 fingers and a thumb but isn't alive?
I am a chair that can move. What am I?
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?