[Spiteface]

I think it'll be Yuna, if they ever bring her back in any meaningful way.

I loved the way she was used in Makai Retsuden and her interaction with Leo made complete sense, as they're both people that cross the line between Knights & Priests.

Like I say, should be Rekka, but by this point she's established as such a badass Makai Priest in her own right that I think she's over the "Girls can't be knights" thing, so maybe if Yuna's arc continues, she somehow is able to summon her father's armor.

I don't think they should retcon the rule, but a huge awesome moment could be made out of that rule finally being broken for the first time.