A mysterious entity that appears to have some connection to Father Antonio. Presents itself in a masculine form that is very similar to Father Antonio's appearance and appears in one bad ending and the true ending. Personality wise, it seems rather mischievous and playful in nature but its mood can switch very quickly to downright anger and aggression. 

(Note)

Oino (pronounced oh-no), has a rather creepy, unsettling voice. Out of all the characters, its voice has great flexibility, sometimes changing in pitch depending on its mood. Remember, it is not human so do your best to sound as inhuman as possible. So, my advice is to do your best with its voice and have fun with it.