Besides having a Shadow Clone openly disguise itself as his main body to lead the team, Mu Yue also had another Shadow Clone secretly protecting his disciples.
After discovering the Akatsuki ninja, the Shadow Clone guarding them in secret immediately dispelled itself and sent its memories back to the main body.
Upon receiving the memories, Mu Yue immediately rushed over, created a new Shadow Clone to protect Kakashi and the others, then had his main body follow the Akatsuki ninja to find the Akatsuki base.
Since he wanted to test the concealment capabilities of his Transform skill, Mu Yue fashioned himself a face that looked somewhat like Aizen's.
Why only somewhat like Aizen rather than using Aizen's face directly? Because Mu Yue had transformed into Aizen during a previous mission, and Uchiha Madara's side might have intelligence on that.
Even if they could not see through Mu Yue's transformation, they might still become suspicious if he looked exactly the same.
If he only looked somewhat similar, combined with the inability to see through his transformation, there would basically be no problem.
Mu Yue activated Transparent World, restrained his presence, and quietly infiltrated the village where the Akatsuki was based.
"Leader Yahiko, today we helped a village drive off three rogue ninja." The tall, thin ninja spoke excitedly to Yahiko, who was practicing taijutsu.
"The two of you drove off three rogue ninja? Not bad at all." Yahiko laughed and praised them.
Though he was quite a bit older than Yahiko, the tall, thin ninja revealed a heartfelt smile upon receiving Yahiko's praise.
The Akatsuki's conditions were not particularly good for a ninja organization. They could only station themselves in a small village, and there were no benefits to speak of. Most of the ninja who joined were moved by Yahiko's