quartz_von_beelzebub
Katakana: クォーツ・フォン・ベルゼーブル
Romaji: kwōtsu fon beruzēburu ("Beelzebub" taken from FFWiki
Original character from Nanaroku (Fortress76)'s Touhou fancomic "Gensoukyou Great Sports Day ～ 200 yojana in a flash ～":/pool/show/1326
First appearance at post #705944