Cthulhu

Cthulhu is a Great Old One and an enemy of Lightsen and his friends.

He is the main antagonist of Relic of Light. He is from planet Vhoorl.

Physical Appearance
Cthulhu is a humanoid alien with a octopus-shaped head with tentacles serving as a mustache, large draconic wings, and dons traditional Cthulhu Army armor. His right hand is a metallic crab claw.

Personality
While Lightsen is short-tempered, yet warm and kind, Cthulhu is just as short-tempered. However, he serves as Lightsen's contrast, being more malevolent and sinister. He takes pleasure in the misery of innocent people and shows little regard in their happiness.

Although he despises freedom, that contempt is surpassed by his hatred toward Lightsen. He desires for revenge against his nigh-omnipotent foe, and will stop at nothing to achieve his goals.

Backstory
650 million years prior to the events of Relic of Light, Cthulhu captured Lightsen and made a foul puppet out of him using a mind-control serum. He then used the Arkean to enslave planets. Eventually, unbeknownst to him, Lightsen managed to expel the serum out of him. The latter then pushed Cthulhu and his army out of a planet in danger of being enslaved, leading to the Enslaver's humiliation. In a fit of rage, Lightsen seemingly slaughtered all of Cthulhu's family members, including the fire elemental Cthugha and the Chaos King Nyarlathotep. From that point on, Cthulhu swore revenge against the Arkean Warrior of Light.

Superhuman Strength
Cthulhu is able to overpower an entire planet, if not a galaxy, with relative ease. He is able to fight toe-to-toe with the already formidable Lightsen.

Superhuman Durability
Cthulhu has a toughness that surpasses the likes of mortal aliens, being able to survive planet-sized explosions unscathed, taking blows that would be fatal for humans, and so on.

Flight
Cthulhu has large wings that enable him to fly at high speed.

Immortality
Cthulhu is a godlike alien, so he can never die from disease, old age, and the like. However, he can be harmed by exceptionally powerful beings and weapons.

Transformation
Cthulhu can transform into his giant form, standing at 83'02" tall. His body is metallic in appearance and has one red gem located in his forehead, one on each side of his chest, and one in his belly. He also gains an adhesive tail.

Trivia

 * Cthulhu is loosely based on a Lovecraftian cosmic entity of the same name.