She's also seen as a monster, not only from the pov of humans, but from her own species pov too. Truly a creature torn between worlds, through circumstances not of her own making.

In Twice Drowned, it's important to both chars for different reasons. For Ophelia, it's myth but also an ending, there's finality to it. Whilst for Logan it's affirming and yet unwelcome in some ways. For both of them it's like drowning.