Kaon Lanchester (カオン・ランチェスター Kaon Ranchesutā) is first introduced when Sōgo Amagi unexpectedly bump into her in Episode 1. She was trying to escape from Roman and Otto from trying on her wedding dress, for, Roman Valoff and Kaon herself were going to get marry, which was arranged by their parents.
In Episode 12, she later marries Roman (which now makes her Kaon Valoff) and she becomes the mother of two daughters & one baby child.