Main character and pilot of the L-Gaim. Daba is a strong pilot and leader. Originally from the planet Mizun, he travels across the Pentagona Worlds, initially to return a cash card to the mysterious Amandara Kamandara, but also leads rebel groups in an attempt to defeat Oldna Poseidal. 

In the Pentagona System, a young man by the name of Daba Myroad leads a rebellion against Pentagona's leader, Oldna Poseidal. Daba's not alone however, meeting a large number of allies along his journey and having in his possession the powerful L-Gaim, a white Heavy Metal left to him by his father.
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(Source: Anime News Network)

A side story taking place somewhere before the second half of the series, prior to Daba acquiring the L-Gaim Mk-II. Daba's comrade Leccee is captured by Poseidal's forces, and Daba and his rebels attempt to save her. 

A recap OVA that portrays the first half of the series Heavy Metal L-Gaim. After the credits, there is a short clip animated for the OVA entitled "Lady Gyabure", which is intended to be comic relief. 

A recap OVA that portrays the second half of the series Heavy Metal L-Gaim. After the credits, there is a short clip animated for the OVA entitled "Pentagona Doors", which is intended to be comic relief. 

Rebooted manga based on the anime TV series.
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(Source: Wikipedia, translated)