You'd probably think the typical, "seadweller's royalty complex finds scum mutant inferior", but that isn't the case with Risske and Clemen. They clash due to their different ethics and individual morals, it just so happens to be borderline blackrom (by Clemen's instigations😏). The question of hemospectrum ethics is certainly explored between the two.
Gonna keep their initial introduction to eachother vague, but it's along the outline of, "Clemen contacts Risske for a private kill contract".