here the presentation of all the harmony
 
Fluttershy: 14 years old  
elemental magic = air  
additional power = natural healing and manipulation of flora and fauna  
inherited ability from Equestria = pegasus wings
 
Rarity: 16 years  
elemental magic = earth and minerals  
additional power = magic  
unique quality = precision in ranged attacks
 
Rainbow: 13 years  
elemental magic = electricity  
additional power = magnetism  
inherited ability from Equestria = pegasus wings, super speed  
unique qualities = reflexes and anticipation
 
Pinkie: 14 - 15 years  
elemental magic = water  
additional power = ice  
unique qualities = agility, endurance, intuition
 
Applejack: 15 years  
elemental magic = fire  
additional power = super strength  
unique qualities = high perseverance, martial arts
 
Twilight: 14 years  
elemental magic: energy  
additional power: spells  
extra magic = ????  
unique qualities = guidance from other carriers
 
They are very summary data but each one will demonstrate what they can do to contribute to the group.**