eiyuu_no_yoroi_wa_tsuneni_akaku_(vocaloid)
English: A Hero's Armor is Always Crimson (The Daughter of Red)
A song for MEIKO (vocaloid) by mothy/Akuno-P (悪ノP).
See Also
* Leonhart Avadonia
* Germaine Avadonia
* Abyss I.R.
* Evillious Nendaiki
** Aku no Musume (series)