As a child, Shigeo learned that his psychic power was linked to his emotions. Strong negative emotions can cause him to hurt others, something he strongly dislikes and avoids (as shown in the 7th Division Arc where, after going 100%, he hurts several teenagers). Therefore, he generally tries to keep his emotions in check. However, in some cases, he can control his powers, e.g. when he is at 100% courage. This could imply that pure emotions, such as courage or the honest and genuine 