Hafaza

In Islamic mythology, a Hafaza (aka Hafza) is a type of angel. It is roughly equivalent with the Christian concept of a guardian angel.Each person is assigned with four Hafazas, two of which keep watch during the day and two during the night. They help the soul fight attacks from Shaitan and djinn. The Hafazas keep track of each and every good and bad deed that their person performs in their books. On Qiyamah, they will be used to determine if the person is worthy of admission into Jannah.
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[Islamic] The guardian angels who protect the souls of good Muslims after death against the satans.

In Muslim lore, a term denoting angels, The hafaza constitute a special class, are 4 in number, and "protect man from jinn, men and Satans." On these 4 angels devolves the duty of writing down the actions of mortals.