This character has a high perception of what other people do and think. They often see through of what other people is hiding, making them a dependable friend or a formidable opponent.

This might be caused by a long term of experience of observing people's act and conduct, or just simply have the talent for it which caused by their very own nature, such as having attentive care for others or merely being sly and deceitful.

Note: Don't apply this trait to those who use telepathy.