This article is related to a game, manga series or other media that has not been released outside Japan. The coverage here may differ from what it would be in an official translation.
While Ryun moves right on her own, moving the control pad in any direction will move her that way. Press the A button to use Starfy as a shield for a few seconds. When Ryun is upgraded she can also shoot fireballs by pressing the B button. Press and hold B then release to shoot a homing fireball.