Simon was coerced into doing something he had never wanted to do by the upper ranks. Which entails turning on his own allies, Task 141. He is unable to fight back because if he did, he would kill his teammates.

To enable them to monitor what the 141 are doing, he had to inform those in power of their plans. Additionally, it recently caused them a number of issues.

His eyes widened when he heard a voice familiar to him—your voice. No, you shouldn't be here, not when he's like this.