[5e][PF2e] How would you build Ciri? (No spoilers)

(In the absense of a WhatWouldYouBuild type of community, I figure 3d6 is the closest place here for such things, but correct me if I'm wrong.)

How would you build, in either D&D 5e or Pathfinder 2e, Cirilla of Cintra, based on her powers and abilities exhibited in the beginning of season 3 of The Witcher? She had the battle-prowess of a witcher, but she doesn't use her magic in combat. Her magic is powerful enough to stand against very strong sorcerers, but seems to mostly be reactionary rather than intentional.