
Originally Posted by
MFauli
You guys want to take his reason for living - Akane would support him. And after being successful, she'd still be there as his wife and make him happy.
Kana would sabotage his plans, possibly actively get in his way, causing him misery and frustration. He'd never reach the point where he can truly let go. Even if Kana fully devoted herself to making him happy, Aqua would always have that nagging feel in the back of his head that'd remind him of his failed mission.
There's only one way for Aqua and Akane is the one that's willing to ride with him.