Despite Keius' quiet and introverted personality, he is not afraid of expressing himself and his emotions. When he's passionate about something, he can be quite vocal in his support or opposition. He can also be very outspoken and honest in his opinions, even if they seem to go against what others might think. But despite his strong and sometimes bold personality, deep down he's still a sensitive and emotional individual who can be deeply affected by the words and opinions of others.