God i hope you are right.
Electrion did say that his sister was always with him and then ephyr appears. That and the other instances of people being surprised that a wyvern can speak and has a dragon core make me believe there is about to be a reveal about ephyr's origin and I bet it's gonna have to do with some magic shenanigans/reincarnation etc.
Um… she said, reincarnation, as in not a relative. Attise’s sister was a human who adopted him. She later on died. A long time past since then. There’s some odd hinting suggesting there could be a connection to Ephir somehow. If the dead human sister’s soul reincarnated as a wavern that wouldn’t be incest- there was never a blood relation from the beginning (adoption + rebirth into a new species/family) but it would be gross and uncomfortable. So I didn’t pay much attention to that part. (Sometimes I’m more scared of the possibilities authors can come up with, than I am with knowing their actual intentions for the story)
Actually i meant his sister that he raised , the child of the woman who adopted him. That's why I said "pseudo incest bullshit", he basically raised her. Also I think that even if you are adopted and have no blood relation you are still family who grew up together and its still as gross as actual incest.If she recovers her memories for the plot twist and its revealed that she reincarnated into ephyr its still incest because of that.

Forgot to include this in my other comment but wtf was that line about attise's sister being with him the whole time and then hinting at ephir?
Damn I just hope this isn't some pseudo incest bullshit again, he legit raised that girl. If ephir is some reincarnation imma lose my shit.