Secret Crush is a recurring unite attack in the Suikoden series.
The Secret Crush attack deals 0.5x damage to all enemies. In it both Flail and Byakuren form a heart that floats over toward Miroon. Then Miroon hits it with her brush causing many hearts to fly out and strike the enemies.
The Secret Crush attack deals 0.8x damage and the Silence status to all enemies and rarely the Alert status to enemies as well. In it all three ladies stand there while hearts float up from the ground.