What's a Marine Staff NCO? Well aside from all the creeds and poster Marine stuff sometimes you're dad. Or gramps, you are the one everyone looks to when the chips are down.
You're an instructor, a task master, or "that no good S.O.B!". You're the guy YOU wanted to be when you grow up. You're bastard at times, but you know you need to be to maintain dicipline.
You are "comand presence". You are a good listener, a story teller, a joker, a killer, or a cop when you need to be. You're judge and joury, or a lifeguard.