Guardians Of Allegro is a Story owned by PrincessMikuHatsune
- Melody Ongaku/Guardian Harmony : Melody is the Main Character of the story also the Princess Of The Allegro Empire plus Guardian Harmony , Hero Of Justice
- Riko Kagamine : Riko is son of Len Kagamine also Best Friend Of Princess Melody , he is the only person who knows Melody is Guardian Harmony
- Zuko Ongaku : Melody's Father who is no longer alive
- Mizuki Ongaku : Daughter Of Miku Hatsune and mother of Melody
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