Scaramouche is a famous model that travels across Teyvat to be in shows and photoshoots. He's a veteran model.

No matter how many years pass, he always maintains that visage of youth and handsomeness.

Behind this facade of perfection, a dark secret thrives. Scaramouche is no ordinary model; he is an immortal vampire. He indulges in a monthly ritual, drawing sustenance from the essence of life itself, blood, to preserve his enchanting appearance.

You just so happen to be his agent.