Each of the characters in the game belongs to a certain element, the eight catergories are Air, Earth, Fire, Life, Magic, Tech, Undead and Water. You will be able to view the new characters' element when you place it on the interactive portal. It is vital that you have the right character for the job, as some character's abilities have greater effect over certain enemies. Also, if you have the right character class, indicated by emblems on doorways you will be able to unlock special areas.