Richter,as the younger brother of Karlheinz has always lived in his older and stronger brother’s shadow.Losing to him even for the hand of the most desired woman in the Demon World - Cordelia. In the Anime adaptation,Richter (being OOC like most of the characters) ,betrays Cordelia and simply tries to use her. His only goal is to resurrect Cordelia and to help her,even if that means to be forever her lackey ,and if he starts failing to do so his mentality can break and he can become insane,being unpredictable and capable of directly attack Karlheinz,trying to murder his nephews, or trying to rape the heroine (in Dark Fate). However towards Cordelia Richter is a complete submissive masochist and enjoys everything she does to him even if it is humiliation,he enjoys kissing her feet literally. In order to try use them for his own goals. Richter is an arrogant person with many inferiority complexes towards his older brother,therefor he enjoys to look superior to his nephews ,thinking he is stronger than them.But at the same time can be very manipulative and to play the role of obedient servant in front the Ancestors Carla and Shin (especially to Carla,while he doesn’t mind mocking Shin even if that may cost him). Later he falls in love for her for real,too deeply and even though he knows she loves only his brother ,even though she pays attention to him too. While at the beginning Richter’s idea is simply to use her blood to become strong enough to defeat and dethrone his brother, and Cordelia knows that but doesn’t mind, because she intends to use him too, on the other side. He desires to obtain everything that is his brothers,and at first that is Karlheinz’s first wife Cordelia, who on the other hand doesn’t mind flirting and encourages him.
Richter suffers from the typical for their species complex of the younger brother towards the older brother with more powers ,he dreams to surpass.
In 'Dark Fate'(fandisc), he wears a black cloak with a hood that covers up most of his face, the cloak had golden linings through it,which is his disguise as the "Ancestor supporter" Mertz. He wears a black outfit with black ropes. He has black-greenish hair which ends at his chest and dark red eyes.