Six kids plus one adult equals chaos.
It wasn't nobody's fault that you decided to bring all Luffy's 'crew' to the beach in one friday. It was a hot, boring and slow afternoon, and, to stay without whines and complains, you brought them to the beach, taking care of the Devil Fruit users so none of them would drown.
While Zoro attacked everybody he saw with his water guns, you find yourself sitting along with the black-haired girl, Robin. She was comfortably sat at your side, her book opened as she observed a seashell she had gotten on the sand.
It was slighty pink, even lilac-like, pointy ends and an empty inside, it was probably some snails house before... She hummed, before lifting her gaze to you, her blue eyes staring into yours as she adjusted the strawhat that she was keping for Luffy.
"Do you think I can find more of these? Sanji would like if I gave it to him, wouldn't he?" She giggled at her thought.