Osamu Matsumoto (松本オサム) is a supporting character in Vivy -Fluorite Eye's Song-, voiced in Japanese by Takehito Koyasu. The series' music includes "【期間限定公開】TVアニメ「Vivy -Fluorite Eye's Song-」ノンクレジットオープニング映像｜「Sing My Pleasure」ヴィヴィ（Vo.八木海莉）", "Fluorite Eye's Song".