When Malaka joined the Blue Orchid District/Faction, she didn't enter the Spiritual Rebirth Formation straight away. As Rean and Roan heard before, she had been there for only three weeks. That means Malaka spent her first week doing other things there.
During that first week, Malaka's Senior Sisters, especially Amanda, tried out her combat power. It was then that they were shocked by her performance. Be it the use of Meridians, Elemental Control, Techniques, Staff Attack Style, etc., they were simply immaculate. The only reason she couldn't bring out the entire power of those moves was her lack of cultivation and comprehension. Nevertheless, a perfect foundation was already laid bare for her.
When they asked how she learned all of that, she simply replied with a dark expression.
"It was Roan, he kept forcing me to train, train, train, and train even more. If anything I did was not to his liking, he would punish me without mercy. I don't even want to remember anymore."