Reversed Evil is when Kiyoshi (Little Hero in present time) met Souma, again.
Souma was create, based on the characteristic of a actual person in real life.
To introduce Souma base on this piece:
The meaning behind the name Reversed Evil is because Souma has 2 times reversed his personality from a kind person to a bad person then during the time on the painting above, Souma has already reversed back in to a good person. However, Souma has not apologize to Little Hero for what he did, there for he still have his evil mark on his face.
This red mark is influenced by Japanese Kabuki dance make up for evil character. So that means Souma did not have this mark originally but then this marks grew as he turned evil. If he ever apologized to Kiyoshi, he will be free from the mark.
Souma is a carefree person but appear after Little Hero life, one of the reasons why Little Hero turned back to be Kiyoshi. Which means, he is count as the villain. However, he changed himself since he can see a mature yet innocent Little Hero in Kiyoshi. Kiyoshi had changed him after the incident he caused her. In real life, he was a good friend, then a bad friend and then a really close friend to Little Hero. Different than Kou, who was close to Little Hero thanks for their silly fights, Souma is close to Kiyoshi because of their immature conflict. Kou personality is a negative carefree. People enjoy being his friends if they know who he is. He cares for his important one. For example: if Souma like a girl, he will only care for that only girl and pay no attention to other girls. He is one of the important characters because he is the disconnection between Little Hero and Kiyoshi while Aki is the connection.