Richter

Richter is the younger brother of Karlheinz thus making him the uncle of the six Sakamaki brothers. Cordelia started having an affair with him and it is said that both he and Karlheinz fought over her once, but Karlheinz ended up winning her heart. In the anime, when Cordelia lay dying (after Laito pushed her off the balcony and before Kanato found her), she requested Richter to take out her heart and have it transplanted into another vessel. Richter had the heart implanted into Yui when she was still an infant and he handed her over to Seiji Komori, who raised Yui as his daughter since then. He later returns to the Sakamaki mansion and he starts watching over Yui from the shadows in order to observe the 'awakening'. It is later revealed that Richter never loved Cordelia from the very beginning and was only using her as a tool in order to become the next head of the Sakamaki family. As the 'awakening' is happening, he tries to resurrect Cordelia in Yui's body, but fails when he is fatally stabbed by Ayato and is finally killed by Laito at the end of the anime.