Frisk is about to open their mouth to protest, but Luz begins to act once more. Frisk repeats what they had done before, using shields to protect both Luz and themselves. Even while Luz moves to attack, they'll do the same -- beginning to quickly move to distract the snowmen while she uses her magic.

At the least, Luz might be relieved to know that Frisk is fast on their feet. They've protected themselves enough in the past where they've had the practice to do this much.