Semi knowledge on what they both are capable of.
Win by any means
The location is the night streets of Japan.
1: Speed Equal (No void shiki)
2: Speed normal (Void Shiki)
3: Speed equal (Void Shiki)
1 - who hit first, considering that both can basically insta kill the other with their abilities, Ryougi more combat focused nature might help her in this scenario, but I call it pretty even
2- Misogi, he is faster than Ryougi by a huge margin, and can capitalize that no problem
3- Ryougi, excluding the speed which was equalized, Ryougi outclasses him on pratically anything.