With this attack, the Dog will hover in midair for a few seconds, twirling about. Next, he quickly swoops down and bashes one target, causing light damage.
The name for this attack was inspired by an anime featuring a girl named Shelly - the main character. During the story, there is a scene where she twirls about, making a 'whirl and twirl' sound.
Also, the sound for this attack was taken from the game Shattered Light. The sound is that of when a female character casts a spell.