I don't know if it can be done but I'd like it if there were bonuses for pairing two particular Knights in a squad. Something like putting Black Baccara and Setaria in the same squad boosts Setaria's attack power by 5% and skill proc rate by 1.1x then boosts BB's defense by 10%.

There's quite a few other pairs that would work too (normal/swimsuit Choco Cosmos and Bipinna Cosmos, normal/baker Sakura and normal/yukata Mei Plumblossom, normal/baker Sakura and normal/New Year's Ivy, Hibiscus and Alpinia, Cherry Sage and Scarlet Salvia, any two of the Pansy sisters, any two of the Tulip sisters, etc).