Lucia Malfoy triggered the one-in-ten-thousand chance of a Floo network accident.
Not only was she dumped in an abandoned farmhouse, she was chased into the forest by three giant wolves and three ugly monsters, then caught by a group of pointy-eared humanoids and sent straight to a cell for the night.
The next day, before meeting their king, Lucia had plenty to say.
But when she saw a real elf, she couldn't get a single word out.
Blond hair, gray eyes; robes, a staff; refined, proud; wealthy, noble.
Hey, this Thranduil fellow has the same look as her. It doesn't matter that one's a man and the other's a woman.
Still, she forgives him on account of his having a son and being just as handsome.
Though she might be the only witch in this world, Lucia knows better than to think she can stand against the Elvenking, no matter how arrogant she is.
With Middle-earth full of dangers and obstacles blocking her way home, she offers up her treasures and knowledge, and sensibly accepts his protection.
Malfoys are born to admire the strong. Lucia is wholeheartedly willing to call Thranduil
