The first time Mahoraga was defeated, it was purely by luck. The second time, everything was prepared for a victory, but due to unforeseen circumstances, the outcome was an abrupt demise.
However, perhaps due to some special circumstances, or because the Cursed Technique was not purely the Ten Shadows Technique, Le Eifu never gave it much thought after being reincarnated. It wasn't until she was examining her Cursed Technique one day on a whim that she suddenly realized something seemed different.
Mahoraga appeared to be in a state of having been successfully tamed, yet not fully tamed. He had followed her across the transition of her reincarnation. Now, Le Eifu could tame him all over again in this new world. A joyous occasion, truly.
Chapter 117