Though Metatron is just a child, he serves as the Great Seraphim. He adores Sevothtarte, whom he calls "Sevy". Despite his rank, due to his age, he is often used as a pawn. He has no wings and seemingly no powers.

Why is Setsuna so mixed up? Despite his attempts to be noble, he'll fight anyone anytime; he ignores all authority; and he harbors feelings for his sister that can only be described as "incestuous." Why is he such a mess? The reason may be found with two demons from the underworld and their enemy, an insane angel who is distributing an insidious computer game called Angel Santuary.
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(Source: VIZ Media)

Mudou Setsuna, a high school student, loves his sister in a way that he shouldn't. He also struggles from supernatural powers. Angels and demons flocks to him as the day of his awakening draws near &mdash;he is the angel Alexiel, the highest angel which fought against God, reborn.