I don't know Female Knight's status, but it might be unexpectedly high. She is dodging with no wasted movements.
"Why is it, why can't I hit!?" (Ren)
"...Why is Iwatani-dono the Hero of the Shield? In my eyes, it'd be better if Iwatani-dono was given a sword." (Female Knight)
"Shut upppppppppppppp!" (Ren)
If it was Raphtalia or Firo, how would they deal with it I wonder? Maybe instead of avoiding with paper-thin margins, dodge simply with speed? Let's ask their fellow student Rishia.
"Hey Rishia. What's your impression?" (Naofumi)
"Fuee? Um, let's see. The Hero of the Sword's attacks are all dull. I think anyone with battle experience would be able to avoid them." (Rishia)
"Hoh-..." (Naofumi)