But when you think about it for most of his time as a "Justice Chojin" he's always been just a borderline goodguy.
How many times has he actually faught alongside the Justice Chojin and not against other Justice Chojin? Remember his shinanigans during the Tag Arc?
of course, but right now in this arc? mourning his dead allies, calling them his comrades. (and this is a group that used that blood power thing back in the Seven Devils arc, in lieu of an actual 'Friendship Power'). right now Buffaloman's more like a Justice Choujin masquerading in a Devil skin, or maybe because he's acting more Justice now then in the examples you've listed. and I don't know why, but that's just too funny to me.
or maybe its just this bottom panel where he hurries to sit back down again.
NO I'M NOT SMILING, WHAT ARE YOU TALKING ABOUT.

@kevinmask01 - he changed his name.