Barreled Scholar Bucrates

Barreled Scholar Bucrates (樽学者ブクラテス) is a stout little being with a barrel-shaped body and extensive knowledge, abile to disguise himself as an ordinary barrel. He is called "Mentor" by Captain Zahab and is the one who taught him how to obtain immortality by harnessing the power of the jewels produced by the Demon Beast Daitanix. He is also the uncle of Spectral Empress Iliess.

Though his vote was for his niece to become acting general among the Balban pirates' release, the position was given instead to Gun General Sambash. During Sambash's term to find a means to revive Daitanix, Bucrates offers his knowledge to aid Sambash in attempting various methods and seeking out different energy sources. However, when Sword General Budoh becomes acting general, Bucrates feels belittled by the samurai having no need for him and works with Iliess to sabotage Budoh before labeling him a traitor so she can take command. Though Zaihab knew of their treachery, he allowed them to believe that they got away with Iliess the new acting general.

However, learning of Dytanix's rotting after he was kept in the dark, Bucrate overheard Zaihab's scheme to use Iliess's soul gem to resurrect the monster before it sinks. Once Iliess is killed, Bucrates attempts to revive her before it was taken by Batobas. Cut down by Zaihab, no longer needing his services, Bucrates is chained up and thrown into the briny deep.

However, escaping his fate and driven mad by his new-found hatred for Zahab, Bucrates changed into an aged form called Pucorpse Bucrates. Desiring Zaihab's death, Bucrates forcing Hyuuga to work for him by trapping the wounded GoTaurus in a small barrel. During the Daitanix battle, he allows for Hyuuga to assist in the battle by releasing GoTaurus temporarily, but draws them both back when the battle is over. However, he is mortally wounded in episode 48, by Steerwoman Shelinda, for his betrayal before he can see his revenge fulfilled. He commits suicide in the following episode, to provide a distraction so Hyuuga can escape without being seen and take GoTaurus with him.