Tsundere Rival, Ruruka

No we’re not kidding that is literally the name of the card.
Presumably also from UK Nationals, it’s even more-al Coral.
Tsundere Rival, Ruruka
“It must be a heavy burden on you to be my substitute huh?”
Bermuda Triangle
Mermaid
[AUTO]: [CB1] When this unit is returned to your hand from (R), you may pay the cost. If you do, choose up to one card with “Coral” in its card name from your hand, call it to (R), and it gets Power+4000 until end of turn. If you have a face up card with “Coral” in its card name in your G zone, SC1.