To clarify the Silver thing, the Silver was a mindless Tomogara that feeds off of emotions to give it power, but in exchange for the emotions it does an action for the person it feeds off of. Ball Masque captured the Silver and experimented on it so it basically only obeys Sairei no Hebi, and that's where the Stand stuff comes in. It basically works on his thoughts and is powered by what he feels, but now it only obeys him.>>9718450
It all depends on how you look at it, there's no clear cut definitions in Japanese anime usually. Most of the Tomogara come to the real world for non-selfish purposes, like trying to bring a love one back to life or something (Friagne). But doing so is like a taboo, so the Flame Haze are there to kill them.
Sairei no Hebi wants to make things better, but he's not afraid to make sacrifices and is taking big risks by operating in the real world, which Alastor/everyone else don't want to happen. Ball Masque are loyal to him, but beyond that they're still ruthless/murderous and all that.