User blog comment:FairyRaven/Fairy Tail Chapter 438: The Seventh Guild Master, Review and Commentary/@comment-24277053-20150601123613/@comment-76.161.172.226-20150601155314

Yuri's basically just saying that as far as he can tell, Zeira is a figment of Mavis' imagination. It confirms that Zeira is dead, and only Mavis can see her, but that's about it. Everything else is an assumption on Yuri's part. A reasonable assumption, but that doesn't mean he can't be mistaken.

As for Zeira's redemption, as long as the part with the two running away from the village and Zeira asking if they could be friends is real, she basically got her redemption.