[This is a horrifying scene when you think of it. Sure, the orges are shiny and awesome looking, but imagine watching your friends get turned into Zombie Ice Elementals and not being able to stop it.]
Zoro: Why the fuck are those samurai running away from their own people?
Drake: Gee, I don't know. Probably because those "plague" bullets are turning them into contagious monsters hellbent on infecting their own teammates.
Zoro: What, seriously, that's it?
Zoro: Oi, Luffy! I'm not helping these assholes anymore!
Zoro: Won't even stick around just because their nakama are getting turned into Magical Zombie Warriors.
Zoro: What kind of bullshit is that?
Meanwhile, Somewhere Inside The Castle, Well Out Of Hearing Ranging....
Luffy: What? Sanji! Did you hear that?
Sanji: The shrieks of dying people? Yeah, we can all hear that.
Luffy: Those people are DYING!? Oh, but it's okay, Chopper will definitely fix them! No, it's Zoro!
Luffy: OI! ZORO! A LITTLE GIRL GAVE ME HER BIRTHDAY RICE! SO I PROMISED I'D HELP!
Sanji: Luffy, there's no way that idiot can hear you.
Back Out In The Courtyard...
Zoro: Tch.
Zoro: Fine Captain!
Drake: Umm... I didn't say anything.
Zoro: But for the record I think these samurai are weak ass losers!
Zoro: Abandoning crewmates just because they're trying to kill you. Where is their sense of honor?