Пандора
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There's another option: Gur and Arandor are angels. Gur merges with the demon Breck, but doesn't want to condemn his comrade Arandor (who, by the way, is suspected of being an angel, although Gur was also suspected – maybe that's why they burned him).
Seraphim - An angel whose wings are woven from flame, carries cleansing fire to sinners
Abilities: Sacred Fire – ignores defense
ND: Purification – with divine fire, burns sins, elevating the soul to heaven