{Quote|The Steel Brave, Kyoryu Cyan!|Kyoryu Cyan's role call}} Yuko Fukui (福井 優子 Fukui Yūko?) is Nobuharu's sister who is a widowed mother with her daughter Rika. She is later chosen by Ramirez to be his successor as Kyoryu Cyan (キョウリュウシアン Kyōryū Shian?).