You may be looking for Dom-Ra, the Dragon Lord on Kamshassa.

The Dragon Lord was a "terrorist" and "dragons' rights activist" on a colony planet, who freed the enslaved dragons on the planet which then attacked and killed the royal family in the Red Castle. He was originally known as a cup boy called "Craig". He sent holographic messages warning the human colonists that they would be hunted next and mined the area with traps, but was killed inside the Red Castle trying to befriend the dragons. (COMIC: The Dragon Lord)

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