"So, Alvey took his mother's name."
"Yes. Not long after he joined the military under that name, the story of how his original Household had kicked out their golden goose quickly spread across Demon Society.
As our Military is Meritocratic, he did not find any issues when advancing in rank, and due to his 'Irregular' nature which only manifested when he was 12—over ten years after he'd been expelled—Alvey could easily dominate anyone in the same generation and quickly became his generation's most outstanding member.
He was in the same batch as Jack (McEnda III) and they became friends, so the Demon Rulers had their eyes on him. This gave him more opportunities to shine and although he did not disclose how, he was able to evolve himself to become the 'Greater Demon' that he is now, increasing his already high base power."