Look, I edit by Koikatsu, but I don't use the game's Defaults, I model the whole body. People were criticizing (in my first game BTT, at the very start of it) a lot about "Koikatsu being easy and boring", so I took the trouble to do everything from scratch (had help from the people of "Kohai academy koikatsu", you can find them on discord), from the body to the custom skin, clothes, and so on. Koikatsu is more than taking cards from the internet after all, but there are a lot of people who unfortunately don't take advantage of its potential. If you like modeling, I high recommend you to try it, even to kill time, it's really funny.
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The pink one is mine, and the last an fanart. Just for a example (Each edition has a body scale/details done diff).
Row up a bit and you will know how! (Seriously... I promised myself that I wouldn't tell anyone anymore!!! xD)
The game works as a "two sides", every girl route has a sub one. Wendy (Carla), Ultear (Meredy), Juvia (Lucy) and so on. With that said, you only need to advance Wendy if you want Carla for example. And I can't just bring Sayla to the game, but I can make one of the Mirajane Take Over (Satan Soul / Alegria / etc) as we have into the anime. Anyway, we will see some "Old" characters coming as Demon, but from August's, not Zeref's book hahaha.