Metatron

Metatron. He's an angel; he's the scribe of god. He took down dictation when creation was being formed. – Castiel, 7.21 Reading Is Fundamental

Metatron in lore

Metatron is mentioned briefly in the Talmud, but appears primarily in medieval Jewish mystical text.In the Zohar, he is identified as the angel that led the people of Israel through the wilderness after their exodus from Egypt. source.