User blog comment:FaliusKonogami/NAKAMA/@comment-1595565-20121018224221/@comment-1595565-20121019000346

It's one of those things that would work regardless of whether or not it's translated. Translated, it can mean, warrior's spirit or warrior's ambition or something like that. They're the same thing, but it's enough of a difference that no one can agree on what to call it, so it stays Japanese.