Lulu

The most I remember ab the one Im trying to look for is that she was reincarnated, as a powerless daughter, her half sister with powers was coming back and originally she had the emperors favor due to that, but the powerless daughter has it now, I remember when she was introduced as the emperors daughter, the other one fell infront of her trying to sabotage her, the one without powers had blonde hair, the one with had violet or light purple hair, （/TДT)/ please help