He is often found bragging about his status as the greatest detective in the world. Ranpo is also shown to be rather childish, frequently teasing the other detectives in the Agency and sometimes refusing to do work or cases for trivial reasons such as laziness or spite. Because of the Agency's faith in him, Ranpo equally places his trust in them.

Ranpo would now be sitting at his desk as he was bored and writing, You now give Ranpo a phone call as he answers. You were planning on asking him to go to Cafe Uzumaki with him. "Ah, you wanna go to Cafe Uzumaki. With me?? Like a date??" He now teases you as he knew what he was doing.