Heavenly Charm

Memories surged like a tide into her head after she was reincarnated, and she found out who she was... A complete pushover. Her name was Beiting Huang, a direct descendant and third-generation descendant of the Beiting Dynasty. Her fearsome reputation stretched across all nations on the continent. She was a girl, but she was disguised as a boy for some reason. Everyone was also after her wrist... to hack it off and take the bracelet she wore, which was actually a high-level spiritual item that concealed her gender. 
Everyone included her own brothers. Her brothers were fighting and killing each other, tearing the dynasty apart in the process... and she happened to be caught in the crossfire. 
Mercy? Did the old Beiting Huang not beg before she died? Did they spare her when she did? An emotion that was not hers stirred within her body, and Beiting Huang knew it was the old Beiting Huang's grief. 
In her mind, she assured her: Don't worry. Since I've reincarnated in your body, I shall avenge you. Your death will not be senseless! After those words, the old Beiting Huang's emotions faded. 
Now, there was only one Beiting Huang. She was the underworld's king, a mercenary lord who slaughtered and plundered with the world at her feet. Reincarnated into the fearsome Beiting family as its 'useless’ ninth son, the world's riches were once again in her grasp. She cultivated impossible abilities, contracted with magical beasts, and possessed a mystical dimension. She also trampled over gods and demons as and when she liked. Cold and handsome, her very presence was proud and magnificent, causing the world to fight for her affection.

The Ninth Sister is a Prodigious Beast Master

When he first met her, she was only a Nine-star Great Spirit Master. In just a few days, she had advanced to become a One Sword Star Spirit Master. She had only tamed a Nine-star Divine Beast, but she had advanced twice. A few days later, she became a High Sword Star Spirit Master.

"Cousin, don't forget about yourself. You're only two sword ranks lower than me!" Beiting Huang touched her nose in amusement. She felt the huge energy in her body and felt a little unstable. She frowned again. "Sigh, I've advanced again. How annoying. My realm is very unstable!"

Chu Feng's legs went soft and he almost fell to the ground. He turned his head and stared at Beiting Huang as if he was looking at a monster. There was a trace of resentment in his eyes.

The Demon Emperor's Wife?