Metatron appears as a celestial being. She is slender and dressed in usual angel attire. She also has a large halo on the top of her head.
At some point before the series, Metatron had mad a deal with Malebolgia that neither angel nor minion would enter each other's domain.
Metatron can be seen conversing angrily with Malebolgia, believing he had broken their pact and goes on to threaten to tell her superiors. Malebolgia persists that he did not and checks to see that spawn had entered Elysium without his knowledge.