It's basic. It's cliché. All because sometimes we need a cute little story where everything turns out perfect.

Imagine this. You relish in killing men. In fact, it is the only reason why you still exist. Actually, your whole existence is perceived by the rest of the world as fabled. And, you have a tail. Yes, a TAIL. Now envision you fall for one of those sailors, that you are ordered (and usually desire) to kill. But then- your leader specifically tells you to kill this man you fall for. What in the Hades are you supposed to do? Especially when either choice before you results in utter doom...