"Line!" His borderline had shattered from the attack but he throws up another a second later, covering Tidus on one side after he is knocked to his knees. He can see Alfredo and Madoka trying to help as well and he runs to get closer to Tidus!

"Mister Tidus! Do you want me to make you invisible again?"

If the sprites couldn't see him he should be able to attack the cage without them attacking back!

"Line!" That was an attack, towards a sprite that was getting close to Madoka.