A downward-arcing power punch used to bypass guards.
If you only know Kyouka Mashiba from the 2017 Sword Oratoria anime, you likely think she is boring. That is because the anime adaptation was a failure. kyouka mashiba
Here is an interesting piece analyzing the "Demon Princess" and her role as the anchor of the Mashiba family. A downward-arcing power punch used to bypass guards