Janus

Nightglade's founder is officially missing, having long grown tired of ruling a metropolis. He only stuck to his city for the first couple of decades before getting tired of the work and duties as their founder. At the time, he vastly prefers pretending to be a regular Lopilu and go on wild adventures and parties. No wonder Nightglade is the unruly place it is...

After meeting Light and Night, who seem to be this founders left and right hands, you uncovered his identity - the Lost is actually Janus! But even so, he still isn't very eager to be in the spotlight, and would much rather keep his assistants busy.