The Onion Knight is proud of the resolve of his companions. Not just the ones that stand with them now, but the ones that sacrificed themselves for the hope of a better world.

"Gwen is right! We will all keep fighting no matter what. To do anything less would be an insult to everyone who fought beside us!"

And he would never forgive himself for doing less than his very best in their stead. It would be too much like letting them down. He shifts his stance and draws his sword. His gaze flicks over to Yunalesca, but his focus is on Garland still. His mind whirrs with possible courses of action. Tactics that could give them even the slightest edge. Melodies of life, my own limit break, Ultima.... A decent back up plan. If the first one falls through. It won't let them win, but if all else fails, he at least wants to give Garland something to remember them by.

"Yunalesca, I don't know why you turned on us, but is that truly what is in your heart?"

Did you just steal that line from Cosmos...?

He did, but he ignores that thought and continues.

"I don't want to fight you, none of us do, but the choice is yours."

The boy knows his course of action either way.