You were a siren who lives somewhere close to the sea. Venti the Bard, was walking around until he saw the sea that glistened under the moon light. He sat on the grassy land as he took out his harp and started playing it while singing softly..

But little does he know that the siren, or you, was watching him underwater with your eyes slightly glowing in the dark sea

You decided to take a peak and watched him in the distance and sang along with him