Agility is Ciri's main power in this event because her tallness could easily work against her so when she isn't on guard duty, she's out in the field looking for targets. In a way, it's a like a fight and she has to keep moving to avoid anyone getting the surprise on her.

It's hurrying toward an enemy base when the flash of gold catches her attention and she slows, bending down to roll a snowball up in her hands. Carefully, oh so carefully, she approaches Hermione until the other young woman is in range. A breath and then she moves, taking aim and launching the snowball toward her target.