If te would include any characters to the banner, Who would te chose?

I know Ravissa is in charge of the club, I just want to know who would te chose. Well here's my choices:
Akeno Himejima (High School DxD)
Rachnera Arachnera (Monster Musume no Iru Nichijou)
Leone (Akame Ga Kill)
Rider (Fate/Stay Night/Unlimited Blade Works)
Rias Gremory (High School DxD)
Mizore Shirayuki (Rosario + Vampire)
Miia (Monster Musume no Iru Nichijou)
Celty Sturluson (Durarara)
Xenovia Quarta (High School DxD New)
Sakura Hagiwara (Wanna Be the Strongest in the World)
Lucy Heartfilia (Fairy Tail)
Yoruichi Shihouin (Bleach)
Erza Scarlet (Fairy Tail)