At first Rey isn't sure she entirely follows. She looks up at Elleru, as if there will be clues in her features.

"To the little...?" Rey starts, tilting her head towards Elleru's touch a bit more. "You mean something like... a lullaby?"

Normally she wouldn't even understand the concept. But distant memories -- true and not fabrications, hint of a time where she was lulled with song and rhymes. It was always one of the few things that placated the monster inside.