I found a way that might work for me!

"Mirror!" Nagina shouted out loud, as fast as she could.

A mirror, more like the usual screen with a reflective surface appeared right in front of her. Without even wasting a second, she stared in to the mirror, her nerves tensing in an anxious bunch.

A young girl, of around age 10 or 12 with hair as white as snow that shimmered and shone like a spider thread looking as if it was made up of finest silk, sat on the stone staring back at her with eyes as red as the fireball.

The long silky strands of the white hair hung loosely from the side of her face and covered her bare chest, acting like a natural shield that protected her body from the outer gazes.

Nagina's eye travelled to her slim waist which widen as it went below. While the body above the waist part remained human, the variation appeared from there.