[...It's nice to hear. And he's grateful too. That even if Itsuki can't fight by Buzen's side, back him up in the thick of battle, or be quick enough to save him from mortal danger...

He can still save him like this. By simply being here for Buzen, and not by controlling him.]

Then I always will. Even when I grow older, and when I'll have to stay behind. ...Even when I'm gone, and only a memory.

[he'd like it if Buzen always came home, regardless.]