There is some evidence that Raphael is based in the theater district of BG, which I like to think might explain his theatrics. As for Absolute, much like the simple terms found in the nautiloid, Perfection, I've taken it to be a connection between the cult and the Mind-Flayers. Again, that could just be me trying to connect things together. As for Minthara and Nere, apart from being Drow, I'm treating everyone following the Absolute like the Cult of the Eyeless, loons short on logic with high fiber scenery-based diets.