Eilonwy is fairly practical, all things considered, but that comes with her homeland. But she's still a product of that homeland and of being raised to learn and explore.

It's a balance between being practical and just being open to the fact that supernatural things exist that merges into her version of normal. Trolls can look like dogs and speak plainly, fairies can come out of nowhere and help guide you on a journey, magic can be pulled out of the air once you study it enough. In theory, Prydain itself should be one giant headache, but it isn't. Much like his own balance of storytelling, so is Eilonwy's view of everything.

So when the story is continued, Eilonwy pictures everything and nods in agreement at being both nervous and excited and then it clicks. Especially after he mentions mirrors.

"Because mirrors can be bad luck- especially if you break them! But if they still wanted to see how they looked, then going to a body of water would be the fastest way to see themselves. Leaning over would cause their balance to change and then.."

Eilonwy trails off, the sheer creepiness of the situation landing. Her tone goes a bit softer. "Then they would fall in, and drown." Again, she pictures it, and the fun of solving the mystery is muted by the fear that must have came with such a thing. Eilonwy rubs her arms with her hands, shivering a little. "I'm sure the water was very cold, especially at night. Temperatures can drop then."

But Eilonwy is worried about her reaction being seen as not appreciating the work of the storyteller, so she shakes her head and then refocuses. "Is that it?" she asks after a moment, a little fear climbing into her voice. Part of her doesn't want to know the answer. Almost.