Miss Bai

She isn’t just pretty, she once killed a heavily injured Martial Saint. She showed up at the trial of the Sovereign Road withe a group of 5 from the Hidden Clouds School among she was the most powerful. Her body possessed immeasurable power. Yet, at the same time, she didn’t seem arrogant or haughty, and, at first glance, she seemed peaceful and serene. However, if one took a really good look at her, one would surely be amazed. Jiang Chen later found out her name when we went to the Realm of Monsters. What type of Monster she is. ↓ She's a large mountain.(Ch.1558)

The thing was that when a mountain had intelligence, it would become a monster.

Appearance
She was a tall and pretty woman wearing snow-white clothes and white boots without even a single stain. As for her skin it was even more white than her clothes.

Trivia

 * Bai wasn't her real name, in fact no one knows her true name. They call her Bai which means white, because of her outward appearance.