Another character at this point in time?!
Warning: Spoilers ahead!
In front of Tatsumi’s house, there were a couple of kids who seemed to be playing with something. When Tatsumi questioned them about it, they both ran off, leaving a shell of sorts. After being picked up, Tatsumi was surprised that something alive is inside.
Tatsumi brough it inside the house and Wakasa introduced him to Maki which is a snail. Maki seemed to pessimistic and tactless which doesn’t approved to be out in the open because he’s a bottom feeder.
After insulting Tatsumi by thinking that he’s Wakasa’s girlfriend, he got hungry and started cleaning the bathroom on his own.
Despite the insult, Tatsumi approves that he’s there to clean up. In response, Tatsumi cleans the shell because its dirty. This changes Maki’s personality to a bit more happier than unusual.
However, when Tatsumi mentions that he’s small, Maki reverts back to his original personality that makes him too much to handle to both Wakasa and Tatsumi.
I am not sure why they introduced Maki at this late of the season as there will be about three more episodes before the season ends. But well, as Tatsumi said, Maki is small and most probably not that versatile to be included in each episode. His voice kinda irritating as it has this grittiness and soft spoken quality to it, but I guess it’s part of the packaging of the snail.