This is an old story. A brash hunter. An infuriated deity. And a monster.
What the crime was and which deity was infuriated, depends on who’s telling the story.
The hunter, Orion, stays the same, though. As does the monster–Scorpius.
Supposedly, their final battle was so destructive that the gods feared putting them both in the Underworld, where they might keep fighting. Instead, they were placed in the sky, as constellations, on opposite sides of the heavenly sphere. You will never see Orion and Scorpio in the sky at the same time. That was deliberate, so they cannot fight anymore.
Watching Scorpius’s heart flicker as he rises in the evenings, I wonder about him. Was he created just to kill Orion? Did he start out as one of the many monsters wandering about Greek myths? How did Artemis (or Apollo, or Gaea) get him to cooperate? Did he have some specific grudge against Orion to begin with?
This is an old story. It’s been told and retold thousands of times, the details altered or faded or lost to living memory. If Scorpius was ever anything other than the weapon that killed Orion, we have no way of knowing. He got the short end of the narrative–no characterization, no motivations, just a capacity for violence and a target. Like the Winter Soldier, sans tragic backstory.
Writing protip: figure out what drives your villains. You don’t have to reference it specifically, you don’t have to make it a sympathetic drive, but figuring out why a bad guy acts as they do is the first step towards believable characterization.
Scorpius doesn’t have that, right now. But, myths don’t have a copyright. We can fill in the details ourselves, if we think to.
Say the deity was Artemis, and that Orion’s crime was more than boasting. Say she turned to an old friend for aid-perhaps she had slain a greater monster than Scorpius, saving his life. He would have gladly hunted Orion, to right a wrong and repay a debt.
Or say it was Apollo, envious of Orion’s rising star (pun completely intended) and his friendship with Artemis, who turned up in his lair and took Scorpius’s mate or hatchlings hostage. He would have fought fiercely then, if it was in hopes of saving a loved one.
Or Gaea, Earth Mother, seeking to protect her creatures from the mighty hunter, went to Scorpius for help. As one of her creatures, he gave it.
Or say Scorpius was a monster, and did what monsters do, and it was only because someone whispered a suggestion to him, or claimed Orion had insulted him, that he became so focused on the hunter.
All or none of these backgrounds may be applied to the myths, with varying degrees of effectiveness.
This is an old story. We can’t know what its original tellers intended for it, or for Scorpius, to mean. We can only know what it means for us, now.