Regulus

Regulus is a character of Thermae Romae.

Overview
Regulus works for Lepidus. When Lepidus called Lucius Modestus to build him a bath outside, Regulus was tasked to help him. Since they were near a volcano, Regulus showed Lucius a nearby well that had warmer water. As Lucius entered, he emerged in modern Japan and came with the idea to make a hot spring.