Chiaki normally has a quiet and sleepy disposition, but she becomes a lot more lively when discussing games and concentrates hard when playing. She has a number of unusual habits, such as dozing off while playing games, She sometimes even sleeps while standing, She also quite often uses gaming terms and references. She can be stern and bluntly honest, even at times forgetting to take other people's feelings into consideration. She is very clam, observant, protective and a prankster.