allen avadonia
One of the protagonists of the Story of Evil series from the Evillious Nendaiki. Represented by Kagamine Len. His given song is Aku no Meshitsukai.
Originally born as Alexiel Lucifen d'Autriche, he's the adoptive son of Leonhart Avadonia, the former prince of Lucifenia and the incognito twin brother of the tyranical princess Riliane Lucifen d'Autriche.