While Tidus thinks about what to do, Yuna remains back and finds herself in a more relaxed pose- hands on her hips and with her stance spread. She isn't really sure what to do as she doesn't want to risk their lives needlessly (especially with what happened), but once he starts speaking and thinking of ideas, she finds herself nodding in agreement.

"Magic! That's it. If nothing happens to the orbs after we throw a rock at it, we should try some magic on it. Maybe it needs thunder to activate?", she says, walking closer to Tidus and looking at the orbs directly.