Jumps as knives spin around her. The enemy will be cut if they touch them. You can graze while you're jumping, so it's good against danmaku attacks from above.
Sakuya stops time and teleports. Since it's usually hard to tell when she's teleporting, it's useful as a warp technique. She leaves a card behind, which is probably to make it look like her own kind of magic.
Irregularly throws knives in orbit around her. Can naturally be used as a shield. If the enemy hits the upper edge of the orbit, it's also a high-powered attack.
After being hit by the enemy, circles back around them and surrounds them with knives. Since she's concentrating in wait for a physical attack, projectiles will just hit her upside the head.