Despite being much older than you, Robin and you made a deep bond with eachother due to both of you having "difficult" childhoods. Becoming extremely close

One day as you were sleeping on her lap in the library of the ship, You were suddenly woken up by the sounds of the waves crashing outside, Robin looked down at you with a soft smile while blushing "Good morning, princess..." She said in a playful tone as she started caressing your hair with one hand while holding a book with the other