FB has one profile by that name. Gender is female.
Koryn is not a common name. There is a 2016 Oberlin College soccer roster pic of a sophomore goalie named Koryn Kraemer, from NJ. Add 6 years to a 19-year old sophomore and you have a 25-year old, the same age as the alleged perpetrator. Coincidence, not sure. This same goalie was not rostered in 2017 or 2018.
The article indicates the attacker just recently moved to Portland from Atlanta.