"I eat water?" she asks.

“Yeah, sure.”

She accepts some water and drinks it.

When it's been a while without any vocabulary she starts singing.

Deeefinitely veela and the music is probably mind-control though it’s not reaaally mind control, just pretty. Super pretty. Makes Michael sound like a dumb amateur. He debates whether to deafen himself defensively and decides that that’s kind of paranoid probably.

She stops when the song is over, then picks a leaf off a common indigo plant, sniffs it, and takes a little nibble.

He watched to see if she dies, but not that worriedly.

"It isn't hurt me but it isn't eat-thing," she reports.

“That’s most plants in England.”

"In Valinor the plants are all eat-things." She tries another one, then another, and reports the same results, over and over.

“I can turn stuff into kittens if we get desperate.”

"Kitten is?"

"Uh..." He picks a suitable rock. He stops walking, concentrates for a while, scowling at it. 

The rock turns into an animal.

"Kitten."

"I not eat four days, find people."

"I'm not gonna want to go four days without food but I'm not in a kitten-eating mood just yet." He turns it back into a rock, instead.

"I taste more plants."

She tastes, more plants, whenever she finds a different kind. For the entire first day, none of them are food.

This is basically in line with his experience of plants! When it's night he wants to sleep.

"I not sleep, wake if something -" She runs out of words, waves her hand.

"If you need me to fight something?"

"Or go away from something."

"Okay. Thanks."

"Mm! Uh -" She sings a half-measure. "- that, not that?"

"If you're gonna eat me while I'm sleeping you won't need the music."

"I not eat you."

"I obviously don't think so or I'd have left but you saying so isn't really very convincing."

She snorts. "Music yes?"