User blog comment:Venusianneko/Brilliant Jewel Part 3 info/@comment-5138366-20190629183836/@comment-37291132-20190630115203

There are only 32 cards for the campaign, if we assume these are 4 piece coords (Top, Bottom, Shoes, and Accessory) this means 8 coords at total so I think they're picking either one unit from each generation (which I think is unlikely since they just had a small revival for Jalapeño already) or one unit per season and giving Friends! 2 units since they're the current season.

My guess is 2wingS or WM to represent Aikatsu!, probably YumeHime to represent Stars!, and to represent Friends! Pure Palette and Love Me Tear or I Believe.