Team Ultra-Rare is a group of mysterious sisters—Kourin Tatsunagi, Rekka Tatsunagi, and Suiko Tatsunagi—that run the card game shop PSY. They seem to have a grand purpose, but it is still unclear. They perform in the Vanguard National Tournament as an idol group called Ultra Rare. They also appear at the Vanguard Fight Circuit. Strangely, this group has some connection with PSY Qualia.
In Episode 157, it is revealed that they were called by Takuto Tatsunagi, who had sealed away their memories so that they would assist him in protecting Cray and Earth. However, if Takuto were to disappear, their current memories would vanish.
In Season 3, Kourin returned to using Royal Paladin while Rekka and Suiko remained using Angel Feather (though Suiko would switch to Link Joker upon being Reversed.) They each transfered into different high schools by order of Takuto Tatsunagi. However, they still perform as idols.
- Rekka transfers into the middle school division of Miyaji Academy.
- Kourin transfers into the high school division of Miyaji Academy.
- Suiko transfers into Fukuhara High School.
In season 4, Sukio and Rekka were the only ones present in the idol group as Kourin went missing, due to her being unconsciously called out by Aichi. It was also due to Takuto's disappearance that the remaining members are not in their card shop PSY. After Link Joker was accepted by Cray and Aichi's existence was brought back by the efforts of Blaster Blade, Kai and his mates, Kourin returns to the group without memories of Aichi as her card Companion Star Star-vader, Photon along with her memories faded away in the aftermath of the battle.