Not much can be said about OMORI's personality, as he is a silent protagonist. However, it is implied that he is quite melancholic, as his narration sometimes has gloomy inputs and his final battle dialogue is directly talking down to SUNNY. His abilities are also reflective of this gloominess, being either violent in nature or simply gaining the SAD emotion, or having an advantage while SAD. However, it can be speculated that this is moreso reflective of SUNNY's emotional state, as OMORI is a character built from SUNNY'S conscience in WHITE SPACE and HEADSPACE. Throughout both his childhood and the game's events, SUNNY is extremely shy and quiet. He rarely speaks and does not like to smile. However, despite not expressing it as clearly as the others, he still appears to care deeply for his friends, as his most treasured memories in MEMORY LANE and the LOST LIBRARY are of his time spent with them. Multiple characters, such as BASIL and AUBREY, describe SUNNY as a "really good listener" who does not mind listening to him vent. HERO also states that SUNNY has a great memory.