I'm not gonna listen to you if you're saying stupid stuff, byon. [Ken glares at Chikusa.] I'll do whatever Axel-sama needs, but you don't get to order me around and act like you're better.

[An idea sparks itself in his brain.] Helping me is helping Axel-sama, right? 'Cause it's better if Axel-sama has the best shinki, byon. So if you're being a jerk, you're not helping me, which means you're not helping Axel-sama, and then I don't have to listen to you. [There's an almost triumphant look on his face at having worked that one out, and for Ken that is pretty high-level reasoning.]