Jack is adopting Fuyuhiko, apparently. Fuyuhiko isn't aware of that just yet, but Jack puts him at ease with his jokes and he likes spending time around the man, even if he's a vigilante superhero. There's also a part of him, deep down where he keeps everything he couldn't show as heir to the yakuza, that admires Jack's unapologetic goodness. He feels protective of that in Jack, and will resort to unsavory tactics to keep that light intact, if he feels he must.
Jack doesn't know either that he's successor to a yakuza clan or what went down on Jabberwock Island, and Fuyuhiko is afraid of what he might say if and when he finds out.
JACK
Jack doesn't know either that he's successor to a yakuza clan or what went down on Jabberwock Island, and Fuyuhiko is afraid of what he might say if and when he finds out.