As daughter of the former demon lord, Mio's foster parents were slain by powerful demons after her life. Still seeking to slay her, Basara reveals himself as a member of the hero clan--an enemy of the demons--and vows to protect Mio as a member of his family.
I hid the fact that I belonged 
to the hero clan from you, too.
Ich hab auch verheimlicht,
dass ich dem Heldenclan angehöre.
Yo les oculté que pertenecía 
al clan de los héroes.
Yo os oculté que pertenecía 
al clan de los héroes.
Moi aussi, je cachais
le fait d’être un héros.
Anch'io vi ho nascosto 
di appartenere al clan degli eroi.
Eu escondi o fato que eu pertencia 
ao clã dos heróis de vocês também.
Так и я не сказал, что из клана героев.