User blog comment:Miskos3/Episode 275: Fairy Tail Zerø: An Eternal Adventure, Review/@comment-4933386-20160312122606

Yeahh I am still not convinced that Zera is an illusion... I don't know... she still there when Mavis falls unconscious... Zera knows she's an illusion... and have a conscious mind of her own...

Only one time we'll be able to see her which is at the end where she disappears...

The way she disappears is nothing like any other illusions she summoned/unsummon.

and then she can't be summoned again? what do you mean? how can you not able to summon an illusion that comes from your mind?

aaaand being able to hear her voice at the end is just strange... like she has a concious mind and has magic capability of her own... I reckon she real fairy.