Nelson

Commodore Nelson (ネルソン提督 Neruson Teitoku) is an extremely obese Naval officer on the East Blue, who seeks the Thousand Year Dragon, Ryūji, for his own selfish purposes. To that end, he hires a man named Erik to do his dirty work. While it is assumed that Nelson seeks the Thousand Year Dragon to make an elixir of life from its bones, he really just wants to go on a diet. Assumed as dead due to Erik's furious attack on him after the return of the Thousand Year old dragon's birthing grounds.

Nelson's rank is roughly equivalent to "Commodore" (准将 Junshō), yet the rank he holds (提督 teitoku) does not exist within the Navy's rank system, according to the author. This is probably an oversight by the writing staff of the TV show, since Nelson does not appear in the manga.