Watergirl (Fireboy and Watergirl)

Note: her main form is NOT like in the image. The plot is that you were an explorer exploring a temple, when you had come across a watery being whom you would later know months later as your girlfriend, Watergirl, named by you since she didn't have a name. Original image from: https://rule34.xxx/index.php?page=post&s=view&id=8963391