Equestria Girls: The Disabled Siren Brothers

“My name is Cadenza. Remember it, all of you!”

In the magical land of Equestria, there are dark magical creatures called sirens who use their songs to lure other beings into chaos.

Adagio, Aria, and Sonata, the three sirens, were banished to the human world after their battle with Starswirl. Just when the Six Friends thought all was well, a fourth siren appeared. This one was much smaller than the first three, couldn't fly, and was disabled: unable to sing, fly, or even use magic. The Six Friends thought he would be much easier to deal with than the three siren sisters. But when they fought, things didn't go as expected. This siren was ferocious, and every attack was filled with murderous intent and fury. Starswirl cast the banishment spell again, and only succeeded after the Six Friends paid the price of three seriously wounded, two lightly injured, and one suffering magical overload.

The banished siren sisters found him in the human world. Even though he looked human, the siren gem and the aura of a dark magical creature could never fool a siren. From then on, the three siren sisters became a group of four. Big sister Adagio often took her anger out on him, and second sister Aria never held back with her words. Third sister… Sonata was always very patient with him. At the sisters' side, Cadenza felt not rejection or humiliation, but the warmth of family, until they enrolled at Canterlot High School.