>>282949037
Because she was going to have a Stegosaurus or Giant Golden Orb Weaver spider devil fruit at some point, but Oda changed his mind, probably because it would have been to hard to have it fit into the overall yokai theme for Maria and her girls, with Black Maria's being based on Jorōgumo.
>>282949106
I still stand by the headcanon that the only reason Yamato wears hair accessories, earrings and seemingly lip-gloss years later is due to Maria's influence.