Overview
o-Man is a standard NPC that can be found in the Mall's Flute Room. He is sitting on a sofa in a room which has a flute lying on the floor that gives the Flute effect, alongside a strange poster on the wall. His appearance is like a purple "O" or "θ" with a single red eye in the center, with two pink legs and light purple shoes, producing music with notes coming out around him. He is similar to the character known as E-Man in the previous room that has a Toriningen at the counter.
Interaction
If the player uses the Cat effect, he will act like he's angry or uncomfortable, like certain other characters, such as E-Man and the Train Passengers. The player can also stop the music with the Stoplight or kill him by using the Knife effect. Afterwards she can sit on his sofa and the BGM of the room will stop entirely.
Interpretation
Some have interpreted O-Man to represent a doctor or therapist of some kind. O-Man is located in the Mall, though said location bears some resemblance to a hospital, as several posters resembling body parts, a reception desk, and a sneezing E-Man can all be found here. Going past the reception desk leads to O-Man. It is also reasonable to assume that Madotsuki would see a therapist or doctor considering various unnerving or harmful themes seen throughout her dreams, such as violence or traffic accidents, which have lead to a multitude of other theories.
O-Man's production of music and close proximity to the Flute effect may also tie into music therapy and the doctor/therapist connection detailed above. The Flute being located in the same room may also be interpreted as the flute being given to Madotsuki by O-man themself in order to play alongside them. In YUMENIKKI –DREAM DIARY–, O-Man is also given a more humanoid appearance (while wearing a coat closely resembling that of a doctor's) in which they physically give Madotsuki the Flute effect by handing it to her. Another peaceful NPC that may tie into the theme of music therapy is Seccom Masada-sensei, who owns an organ that Madotsuki can play.
The parallax background in the Graffiti World also somewhat resembles O-Man and E-Man, indicating a recurring significance of the characters as the Mall and Graffiti World are connected to each other.
Gallery
o-Man on the sofa
Using the Cat effect
Madotsuki sitting on his sofa
Fan art of the poster in the room
