Fay

He is fearless in battle, yet fearful of life. The strongest warrior, yet also the most hollow person.
She is touched by the devil, yet born angelic. Most satisfied, yet also the most greedy.
They find many similarities in their many differences, bringing their hearts closer but to only widen the gap between their fingers.
Polar opposites are meant to complement each other and bring out their best, but only the worst welcomes them, which may be their prime fate.