She was as lithe and graceful as a fairy and her entire body was enshrouded in cloud and mist making it impossible to make out her features clearly, and one could only vaguely see a pair of eyes that were as tranquil as an ancient spring. 
Kind hearted; detests killing. As seen when she recovered she didn't kill the people who destroyed the Eternal Night Royal Family, and Frozen Cloud Asgard, which was built for ill-fated girls who had nowhere else to go.
She is a very calm and smart woman, author described her as "Spotlessly ice-cold hearted."
Mu Bingyun is an important elder of the Divine Ice Phoenix Sect and her elder sister is the Realm King of the Snow Song Realm. Her strength is considered high in the Snow Song Realm giving her some reputation in that field. She is the Palace Master of the Ice Phoenix 36th Palace.
Her elder sister Mu Xuanyin mistakenly hurt the son of Huo Rulie, causing his anger, but he couldn't do anything to her because she was stronger, so he decided to place his revenge on Mu Bingyun, poisoning her with Horned Dragon's Poison. Mu Bingyun used a dimensional stone to escape and arrived by chance on Blue Pole Star. The severe poison wound caused her to lose her power and memory.
As she regained her memories and strength she created Frozen Cloud Asgard, for women who had no where else to go and eventually left Frozen End Divine Arts, a supreme profound art from the Realm of Gods, with the sect. However, it was impossible for normal people to cultivate, thus she created Frozen Cloud Arts within seven days, before eventually leaving.
- She seems to be bad at giving names, giving childish or pet-like names
- Her sword Cloud Butterfly Blade was given to her by her mother