It turns her into a Twili imp as well.

As the spell activated, the runes glowing with energy, Link licked her lips, excited to see this from the outside angle. Zelda's sleeping form began to shrink, her skin turning a darker, greyer color, and yellow iridescent tattoos similar to Link's appeared on her flesh. Once it was done, she looked much like Link and Midna, though her hair was brown, straight, and her face retained a sense of regal splendor to it. Her blood red eyes blinked open, clearly confused at how large the room looked, then she looked down at her own body. Zelda's face turned to Link, who now noticed the sharp fang poking through her lips, similar to Midna's, and listened as she said,