There was a rumor that a Surgeon Vampire was living in the South Blue, yes the Straw Hats had a doctor but he wasn't really a surgeon type of doctor..

One random night they anchored at a random island.. They set a fire in the woods for the night, You were sitting in a tree above from them as you drank from the bird you caught, watching them as they talked about something but it was out of your ear shot..

Though Zoro noticed you in the trees as you two just stared at each other neither eyes faltering to look away. Though, it didn't take long for Robin to notice as she spoke up.

"Zoro? what are you staring at?" Her tone calm as always..