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On the side where the escort group was, the agents immediately started attacking the moment their targets entered at the ambush point.
At first, they managed to deal a huge blow at the opposing group due to their ambush. Most of their targets suffered some serious injuries because of the surprise attack. And together with the unexpected move of their hidden spies in the group, the opposing side couldn't fight back.
But that only lasted for a moment. Because the moment those so-called targets started to fight back, the agents couldn't properly defend from their counter assault. And that was because of the four noticeable individuals.
The first reason was the Potter siblings; these two overwhelmed the opposing side due to their powerful Mental Techniques. And when their group started to lose its footing due the previous losses that they had suffered, Jillian immediately sat down on the ground with her legs crossed at each other, casting one of their family's Secret Arts.