So picking a servant for the extra slot used to be a no brainer because my choices were Mash and Gorgon. After CCC I have Passionlip and BB to choose from too.
Except when events dictate otherwise, who would be more popular? They fill such different roles…
Gorgon np1 9/9/9 (haven’t decided if she earns my dwindling lores yet)
Passionlip np3 4/5/6 (stuck on archer gems)
BB np5 6/6/6 (stuck on rider gems)