Olivier Vatine made his name with this 1989 sci-fi graphic novel series which was an inspiration for James Cameron's Avatar. Out of print.
From the publisher:
Nao, the last survivor of a starship crash, lives a peaceful existence with the natives of Aquablue, a world covered by vast tranquil seas dotted with small islands. But, Nao's life quickly changes when a group of Earthmen arrive with plans that would leave Aquablue a barren world!