The MC isn't likeable at all. She hates her sister and dislikes the way nobles act but she does exactly the same things her sister did in previous life and acts like a common noble would. What's worse her life is centered around revenge, she doesn't seen to be having fun other than gloating and after her revenge is done what will she be left with? It's pitiful, and even brief moments when she remembers her commoner life and enjoys her current life aren't enough to broaden her perspective. It feels like she's asking for some trouble or, at least, to get killed by her sister a second time.