Nathanael was the best fighter of the Delta Special Forces. He was on a different level than the other special forces members. With such speed and power of the peak level of spirit enhancers, maybe only Rama, Arief, or Winter who could defeat him. Aria might not be able to defeat Nathanael as she not have as fierce and have less fighting experience as the other three. But why didn't Alex, who was only a top-level mortal realm warrior, let the three of them to fight? Of course Alex had something that remains a secret. This was what in the head of the fighters who know Alex well.