The "brother" unicorn is a fellow unicorn who gets summoned in Randy's route. Upon being summoned, he realizes that his "brother" unicorn (they aren't blood siblings, he was just a fellow unicorn) has been killed and is enraged. 

In the Wizardess Heart world, this kind of dignified creature is only capable of inhabiting places where they have pure water, clean air, and soil. Unicorns hate human beings, and they rarely show their appearance, thinking that they are better than humans. These creatures are extremely prideful, getting easily offended and angered. They are a majestic creature, and killing one is a great crime. They only appear to pure maidens, and unicorns in this otome are all male. 

Voice: Majestic, strong, possibly slightly prideful. Also open to interpretation

Accents: Any accents are welcomed, american is preferred