Suiko Tatsunagi is a character in Cardfight!! Vanguard Anime. She is the eldest sister of Rekka Tatsunagi and Kourin Tatsunagi. She helps them run the cardshop PSY, and is a member of Team Ultra-Rare. In PSY, she handed Aichi Sendou his new ace card, King of Knights, Alfred. She seems always calm and settled as a facilitator.