The potential

Louise used to be an insecure 25-year-old girl who could not even kill a fly. When her former friend Richard went on a killing spree, in order to obtain as many special powers as possible, it turned out Louise could not be killed. She is discovered to be a "potential". These deadly potentials can receive the abilities of their victims, and the last potential standing will become their king or queen. Will Louise be able to stop Richard from becoming king?