(MC) Leon - person hailed as genius by the people of his time . He has tendency to achieve his goal by any means . In Previous world he was son of a politicians hence knows every person has a dark side .

( AI assistant ) Leo - system made by MC in previous world using technology to activate unused brain potential into another consciousness of same person . which works as personal help .

This was one of the most important discovery and secret which MC carried in his original world .