Guilt

Being away from home, after not spending a single day elsewhere his entire life, up until now, was starting to get to the young Keyblade Master. The thought of his mother feeling so alone was constantly tugging at his heart and knowing that Kairi was just as anxious to see him come home did nothing, but add to the guilt that was tight in his chest, heavily hanging on his shoulders, and nagging at him in the back of his mind.

But, he found a way to use those feelings and transform them into a burning fire that sparked everytime the Keyblade appeared in his hand, when a battle was demanding to be fought, knowing that the sooner he fulfills his duties, the sooner he can return.