La Folia Rihavein  

, ラ・フォリア・リハヴァイン

La Folia is a friendly young woman who appears laid-back and amusing but is actually quite observant. She's the princess of Aldegyr and has made a blood pact with Koujo, making her the third person to do so. Despite being related to Kanase Kanon through an affair by her grandfather, she treats him as if he were her real brother.