The main issue with this pack is that .json files are not prefixed with `data_'.
You normally want a structure like:
'game/content/chars/fairy_tail/data_lucy.json'
'game/content/chars/fairy_tail/data_mirajane.json'
If you want to check, add all of your girls to the MC, with config.developer = True, open console and type in line by line:
ft = [c for c in chars.values() if c.origin == "Fairy Tail"]
hero._chars.extend(ft)
This will add all fairy tail chars to the MC and you can add them to the party or talk to them in profile.