Aelita Hopper, Aelita Stones or Aelita Lyoko
Aelita in the credits 
Aelita on Lyoko
Aelita-Xana
Aelita in a tower
Aelita - Matrice
Aelita on Jérémie's computer 
Aelita on Earth 
Aelita
(Saison 1) False Start | New Order (Saison 2)
No possible increase.