The Feel of Hijacked Senses

When faced with this situation, Benjamin could only breathe in deeply with both hands lifted, indicating that he surrendered.

Before Benjamin came here, he had thought of the possibility that these people could be setting a trap and even considered the young man’s presence. But he did not predict that the young man would have such bizarre abilities; that the young man was able to disguise himself as Augustine to such extent that even Benjamin was unable to see through him at all.

He had underestimated them...

After identifying it was "Augustine" that was surrendered to him, he did not use his water particle sensing technique to verify his identity. Otherwise, no matter how great his disguise was, Benjamin would have been able to see through it.

But there was no use regretting over what had already happened. Benjamin was put in a tricky situation as he did not know what was his opponent's motives, thus, he could not predict the young stranger’s next move.