Reginous is an interesting one, in his debut he used to be this sort of corruption in a high status being from an rp I was apart of. However after starting Eons, his backstory has been changed gradually.

He is an ancient being of a race that no longer exists in this time and age. He is called a "Remnant" for that reason. He was sealed away along with 2 other individuals of his race like him for their entire race to survive from the oncoming threat that was coming to them at the time of their sealing. Reginous was the last individual to be released from the sealing platform, which was in severe conditions, being located in the Subspace. He relocated into the mainstream and found that Earth was the easiest location to conquer due to his weakened condition. He would then encounter Nullified Mekka and challenge him, to find himself to be evenly matched compared to him. After the realization from both sides, Mekka convinced Reginous that he wouldn't be able to conquer the planet with the monster he was aiming to destroy was still roaming around, and not even he was capable of defeating. Reginous took into consideration of the threat the monster Mekka was talking about, and decided to ally himself with him to aim to destroy the target.

After being defeated by the Charles siblings, Mekka became out of the picture. Reginous would be the last one remaining before lashing out at full power that he could tap into. But Charles was capable of neutralizing all his blows, and reached out to redefine his purpose. Reginous was stapled to be one of the three Remnants to regain the glory of his race, but he would mention that he was tired, even then he was tired, but now that his entire civilization was wiped out, he felt the upmost responsibility to regain that glory. Charles would tame his mindset and subside his desperation.

Reginous would stand down, still conflicted but willing to allow Charles to redirect his focus, becoming friends in the process.