Yotsuba and a Pirate

My entry to a drawing contest held by Sangatsu Manga, the biggest manga publishing company in Finland.

The theme of the contest was "a meeting between two heroes" and the rule was to use characters shown in those series Sangatsu has published in Finnish.
Battle shounen series heroes meeting each other would be cool, but the idea is a bit overused, so I went for something a little different, a meeting between two characters from very different genres. At first I thought of a meeting between Luffy and Yotsuba, but since I wasn't confident I could draw Luffy in a right way, I ended up with Robin (not that I can draw her the right way, either...). In early drafts I also thought of adding other strawhat crew memebers fooling around in the background with Yotsuba&! characters, but that would've made the picture too crowded (plus it would've been a pain to draw), so I ended up with this relaxing, cute picture of Yotsuba showing off her drawings to amused and internally cute-struck Robin.

PS: Yotsuba's drawing is supposed to be Thousand Sunny.
PPS: Yes, I added a Naruto reference for the heck of it.

EDIT: This picture was given an honorary mention in the contest. Yay!
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Yotsuba c) Kiyohiko Azuma
Nico Robin c) Eiichiro Oda