Demyx will never fight his own battles if there is an easier way, Xion. It might be bad, it might be good, but for him it simply is. What counts as 'easier' to him, however, may differ from what we consider easier. When he finally chose to fight, on the day he disappeared, he could have run again. But perhaps to him, there was no easier way.

[It seems a little strange, to even try to explain the man framing him for god knows what, in a way that might make him not as disgusting as Xemnas saw him. But he was, if nothing else, honest. More or less.]

In this situation, I imagine he seeks to put as many people between himself and myself as he can. Fighters, or just the wary, anyone who will watch out and protect him. I don't believe he's considered that if I wished to, I would go through every barrier he placed in my way, and their blood would be on his hands, for he knows what I will do when I must.

[Xemnas sighs, the last vestiges of fury draining out. It would take a while to work up a good mad again.]

Doing so would destroy any peace I could enjoy in this land, likely permanently. But I too must follow my nature.

[A smile then, faint and brief, there and gone in the span of a heartbeat.]

Thankfully that nature is not blind, reckless fury.