SUPPORTING ROLE

Lana and Cia, originally just known as Cia, are two halves of the Goddess of Time. Cia, who had fallen deeply in love with the Hero over the eons, and seeing how their lives play out, eventually fell into despair upon seeing the fate that awated the Hero of Time. Attempting to change history, she gave into the darkness and became an evil witch, which her good half becoming Lana. Before the events of Twilight Princess, Lana fought alongside the Hero of Time to stop Cia, who eventually transformed into a monster and perished. In Twilight Princess, Lana asks the current Link to help her "save the fate of a different world", as Zant has hidden a shard of the Mirror of Twilight in the Adult Timeline during the events of Wind Waker. 

Lana and Cia have contrasting personalities, outside of their physical appearences. Lana is selfless, caring, and puts personal feelings aside for the greater good, while Cia is selfish, sadistic, and is unable to control her warped desire of "saving" the Hero of Time. Both of them, however, care about the other, and will overexert themselves to the point of near death to gain the upperhand in battle.

As they were once one, they share the same voice, ergo why this audition is for both of them. Lana has a high-pitched voice, while Cia has a low pitched. The best example of how I want them to sound in English can be found here for Lana: (https://youtu.be/DNcLkVusgP4?t=3) and Here for Cia: (https://youtu.be/L5NvazsRoFQ?t=3)