A mad scientist who lives in the town of gloria, Bucchi is often shunned by the rest of the townspeople for being reclusive. He constructs an armor to take revenge on the town for their unfair treatment of him and discrimination against his work. He's defeated by the eldora five (with a little help from Van), and given a chance to mend his ways.

To make up for his past misdeeds, he enhances the El Dorado with new technologies, such as the bucchi engine, much to Nero's chargin. The eldora five do not bring Bucchi along when they join with Van, which Jose believes was a mistake, and he always reminds Nero of this fact whenever they have trouble with their armor's maintenance. However, Bucchi does send data to help Joshua with his calculations, in order to send Van into space.