User blog comment:Ayumucriceto 2015/Edolas' Nagi/@comment-23993601-20131225040407/@comment-7418318-20131225083028

We don't even need to look into the filler: Just look at Mirajane, Macao and Jellal's true self (pre-possession). They all match up very closely or even perfectly between their Earthland and Edolas versions.

And don't forget that people's personalities can change over time, like "Demon Mirajane" becoming "Friendly barmaid Mirajane" or pre-possession Jellal turning into a villain and then a guild-ridden almost masochist asking for punishment by his former victims.

And once EL-Wendy found her confidence she's also remarkably similar to Edo-Wendy, despite the different ages.