He was off-panel for 300+ chapters since Marineford, where he was just you normal marine soldier until the speech thing, which was something about "how marines should be"??? Even though arguably Marines would've benefitted more from continuing the war and killing Blackbeard pirates, but Koby's naive self was overwhelmed by the emotions from CoO and did the speech. Ignoring the mass murderers that just arrived from Impel Down.
He comes back to Riku and such praising him, nothing special there
He is then off-panel for 150+ chapters
He comes back at Amazon Lily, where he's saved by an emperor. But negotiates himself to save other marines, heroic shit. But we've seen other Marines do more heroic shit at this point already.
Few chapters later at Hachinuso he's saving civilians from pirates, standard quo marine job.
Where is this again and again happening??? he's done basically standard marine quo stuff where he saves civilians from pirates.
The only person who has been blatantly been cast again and again as something the Marines should be, is Fujitora. Since Fujitora provides an actual change to marines in their core principle of how they operate. No other marine.