Stormtrooper996
Order 66
My thinking is that Longinus is a upstanding person I get a Paladin feel from him and well Casket is one step away from being a full out bad guy in this world of greys. The two men probably get into it quite often over Casket selling drugs and taking advantage of the sick and injured. Casket sees longinus as a threat but does respect the man due to his politeness and good treatment of Robin and Tweedie when he sees them in town.