I do have a bone to pick with how the game explains that. Because while it's quite easy to get Barbara as a unit (she's been given as a gift twice, at least), her profile page mentions her "older sister" many times, but never outright say it's Jean. That's only clearly explained in Jean's profile, and that one is harder to read, since Jean is a 5 star rarity unit not everyone gets from the gacha.
My point is simply, why not make it clear in BOTH sisters profiles?
