It has been several years since I watched Scrapped Princess, so my recollection of the details of Fulle's part in it is a little fuzzy. I see myself rewatching the series in the future to make this section more detailed.
Fulle appears late in the series, as a mysterious young man who takes in amnesiac Pacifica. He watches over her carefully and they fight like cats and dogs, but before long, they are living in domestic bliss. Fulle gives Pacifica the normal life she has always longed for, even if she cannot remember that wish while she is with him.
In the end, Fulle gives his life to save Pacficia and reunite her with her family. She cannot remember him. It's bittersweet and it hurts, but his contribution was beautiful. He was a jaded young man with no direction in his life after he gives up being an assassin. He found someone to believe in. I actually stopped watching the series for several months after it.
And as a point of note, Fulle is played by Konishi Katsuyuki, one of my favourite seiyuu.
The art used in this layout was drawn by my friend
Caddy, who was nice enough to let me use it if I could find it. And I did. The site name comes from the original inscription on the pic. He's nutty like that.