With a body stronger than the known diamond, Diamondhead is the alien hero of choice for invulnerability and invincibility. Diamondhead has the unique ability to grow crystals on any part of his body, making tools and weapons that are extremely sharp, allowing him to cut through almost anything. This also enables him to regenerate his own body from any damage received. He can also fire diamond shards as projectile weapons. Not only that, but his body can also reflect weapons that deal with light and beam. As he is the most recognized alien to be strongest in defense, the only disadvantage is that like any other crystal known today, sonic weapons can shatter his crystal body.

Diamondhead is a Petrosapien from the planet of Petropia.