If you'd like more details on the following episodes or Seika's specific Onmyouji techniques: Summary of the in episode 6

Details on and her connection to the demons A breakdown of the Onmyou arts Seika uses in combat

After entering the academy, Seika Lamprogue is pressured by the principal to participate in a mixed-disciple combat tournament. While the principal seems to have ulterior motives and knowledge of Seika’s unique roots, Seika views the event primarily as an opportunity for investigation rather than a chance to show off.