Suggestions for an Esdeath character?

My boyfriend wants to build Esdeath as his PC for an upcoming module I'm running. He asked me to query the great hivemind for suggestions for his build. Kineticist is obvious but what else?

Here's a video to one of the iconic fight scenes (spoilers for Akame Ga Kill): https://www.youtube.com/watch?v=f4eSfqXyoFk