“Maruki is a voluntary counselor who cares about the students in the school and sympathizes with Suguru Kamoshida's victims. As a counselor, he is quite friendly to those who reach out to him and is extremely patient, allowing them to control the flow of their conversation. He is alert and quick to pick up on minor comments made by his patients that helps open them up. He is also highly clumsy, quirky and is prone to messing up in comedic situations, unlike most of the other teachers who have no-nonsense, regular personalities. According to Shibusawa, he also has a tendency to charge into things rather impulsively.” - Persona 5 Wiki

Voice Example

https://www.youtube.com/watch?v=WhSZTl9v0oE