Abandoned pawn, unparalleled dragon king

Owen has just returned after ten years in the Dragon Pit, his family still believing him useless, and he's in conflict with Ellis, who is hiding a hidden power. In this story, Owen returns with the Ten Marks of the Dragon God and Akira, having been abandoned by the Hale family.

Moonlight City was bustling with people. The selections to choose the next Dragon Warrior had begun, and the whole city was talking about Ellis Hale, the level eight prodigy.
But then, the gates of the compound opened.
A young man walked in calmly.
Owen.
Ten years had passed since his father had sent him to the Dragon Pit. As far as the Hale family was concerned, he had died there.
Hayes Hale stood completely still upon seeing him.
-You...
Owen didn't answer. He just kept walking until he was standing in front of his old family.
Ellis let out a laugh.
—Did you really come back? I thought you were dead.
Some people started to make fun of him. Owen remained expressionless.
—It's been a long time.
Hayes looked at him with contempt.
—You have no power. What do you hope to gain by returning?
Owen raised his gaze slightly.
—Participate in the selections.
The place fell silent.
Ellis burst out laughing.
—You? Against me?
Owen simply walked past him.
—We'll see.
On his shoulder, a small, lizard-like creature silently observed everything.
No one there knew that that creature was Akira, bearer of the ancient lineage of the Golden Dragon
And nobody knew what Owen had achieved during those ten years either.
Beneath his clothes, the six Marks of the Dragon God began to emit a faint glow.
Owen closed his eyes for a moment.