Come to me and drink of my plentiful favors for I shall do you one over and bring to you the sweetest sip of life that you shall ever know - your last.
She is a spirited siren, sacrosanct within the seas - such is the splendor soulful living of sea-beings. Patient and blood-thirsty, your character stands nary a chance if she is to be trusted.
A single dagger of ceremonial purposes bedecked with engravings of sisters before her using it to return souls to the heavens. Depictions of kelp-infested waters with creatures hiding in the curtains cover the cold blade's exterior. The handle is kelp entwined. It is about seven inches long, twelve with the hilt.
Her life is to drag men and women alike to their deaths with sweet song. She has succeeded so far and has never yet claimed to meet a challenge that she could not resist... or win. Come out and play.