Everyone has a destiny. Some resign themselves to the path fate chose for them. Some forge there own path. Some couldn't care less as long as they're alive.
Centuries ago it was a popular belief that you are not in control. That no matter what, fate cannot be changed.
But what if it can?
There are many outcomes to every decision you make. The peacock kwami would be able to tell you as much.
But Marinette Dupain-Chang and Adrien Agreste were meant to be miraculous.
If they never did receive a miraculous, the universe would try to right itself and they would go on to do great things.
But it was quite obvious to the holder of the turtle miraculous that they were the ones.
When he met them he was positive they would be the next successors when the time came, but the question was which one will be creation and which one will be destruction?
So it was necessary for the Guardian to look deeper into the lives of his chosen.
Master Fu first met Marinette Dupain-Cheng when he came into her family's bakery. She was polite and had a kind smile that put people at ease. But she smiled bashfully when he had complemented the macaroons and stated she had made them herself, which let him know she was rather shy.
Over the time he watched over the girl he quickly realized there was more to the kind girl than her baking skills. He saw a girl who was too curious for her own good and preferred to stay in the shadows, but would fight with a fire if it was for something she cared about. Quite ferocious she was indeed.
The boy was quite the opposite of the girl and yet was the same. He preferred to be out of the limelight, but grew up thrust in the spotlight. Even though the boy was raised in isolation half his life he held no malice. His heart was kind. It was obvious he needed someone to love him.
The boy he had met on a sidewalk. Adrien had been in the gardens when Master Fu had "fallen". The boy had rushed his way out the gates to help him, even despite his caretakers objections.
After looking at their personalities it was obvious which miraculous belonged to who and he knew that fate would be happy with his choice.