Character: Griphook

In vault number seven hundred and thirteen had no keyhole.
- Stand back, - said it is important to Griphook. He gently touched the door one of his long fingers and it simply melted away.
- If it tries to make someone, other than working in the Bank goblins, it sucks it inside, and he will be in the trap, ' said Griphook.
- How often do you check if there's anyone inside? - asked Harry.
About every ten years - said Griphook with a rather nasty smile.