Losing his parents when he was of an early age, he learned to rely solely on himself.
He has no relatives, no real family, and certainly nobody to depend on.
Back then, his foster family was no more than strangers, and opening up to them was hard.
So all he had was himself, and that made him strong, translating well when he came to the age—where he first applied to be in the military. For the longest time, he carried himself in such a demeanor, unbreakable, and that has two effects on people.
Be it intimidated or find him dependable.
Now, when he's crowned Emperor, everyone is relying on him
Rex was the backbone of the empire and his new family, the rock against the tidal wave.
No matter how much he wanted to, he couldn't break, or everyone would break.
It's the responsibility of a leader, or in his case, the responsibility of the Alpha of the pack.
