According to Scarlett Jennings's previous analysis of the "System," the Evil God System behind Azura Loomis primarily targeted Fortune.
There were probably two ways to obtain Fortune.
First, it was acquired from close people around her. Using Chase Jennings and Odessa as references, these two were relatively close to Azura Loomis, so they were the first to suffer.
Second, was seizing the body, like the method Hestia Knight used when Scarlett Jennings first had direct contact with the so-called System.
"For those whose bodies are seized, their bodies would be occupied by an external Living Soul. That so-called Living Soul would follow the 'System' instructions to inhabit the body for seven days. After seven days, when the Living Soul and the body completely merge, it means the seizing was successful,
and at the same time, the original body's Fortune would be taken by the System, and the original Living Soul would be permanently trapped within the doll used as a medium."