Hikari blinked at Yoshino's answer about it being complicated. "...Okay, yeah, I guess I didn't ask that question very well. That's what I meant, that it wasn't something that only he could do. I mean, it is how you all evolve your partner's, right?"

Which, well, did bring the next obvious question to mind. "So, uh, did anyone else you know do what Masaru-san did? Or was he the only one to fight that way?"