Nemu is a mysterious individual that keeps to himself. In order to properly act as a hidden moderator for the cram school, he would rarely partake in group activities and would often avoid speaking. When he needs to communicate, Nemu typically uses a sock puppet to talk in a high-pitched voice, and will often address others in a rude manner. He commonly does not show respect for his superiors, and will ignore their questions.

Once his role as a moderator comes to light, Nemu continues to maintain his quiet, eccentric demeanor. However, he is not above putting down the cram school as a waste of time for someone of his skill, indicating a high level of self-confidence.

I would like his voice to sound slightly Lazy, he can have a bit of a twist to his voice.  You may give him your own shot.