Sariel is one of the Four Archangels. He was a decent minor protagonist.

We see a decent battle he fights against the Ten Commandments during the original holy war. He gets seriously injured when he plays around too much and they get the upper hand. After the death of Mael, Sariel along with the rest of the goddess race, give up their bodies to seal away the demon race.

When the demon race is freed, he takes the vessel of a young boy so he can continue the fight.

Tarmiel and him fought Estarossa in an attempt to get revenge.

His grace is Tornado which is pretty self-explanatory. Powerful but never takes out anybody important.

After they start losing against Estarossa, his vessel ages rapidly and it’s revealed that his body was not young boy, but a young girl.

They decide to abandon their vessels and fight Estarossa with their original bodies. They are shocked when they learn that he is Mael cursed by the original Gowther.

And when Mael is corrupted by The Commandments still in his body, he goes berserk and murders both of them in a rage. A very sad way for both of them to go.