Link to an example of her full body sprites

Official Profile:

"A girl who cannot remember anything except for the word Sora. Having forgotten her name, talent, and past, she participates in Hope’s Peak Academy’s school trip. Perhaps due to her desire to find her memories, she is a very curious girl with a somewhat blunt way of speaking." 

Director's Notes

The protagonist of SDRA2. Sora wakes up at the beginning of the game with no knowledge of her talent, past, or even her real name.  As she is the protagonist, the voice actress who plays her must be prepared to record many lines in a convincing, charismatic way. As such, the casting process for her will be stricter than the other characters, but please don't be too intimidated.

Voice:  

Original VA: N/A (However, LINUJ has answered it would be like Chiwa Saito (as Hitagi Senjogahara), Kana Hanazawa (as Kanade Tachibana), or Yoko Hikasa (as Kyoko Kirigiri) )

In the original game, Sora's voice is portrayed by the (male) creator run through a vocal changer. As such, there is no real frame of reference for her voice. However, from the game itself we can see that Sora is often calm and composed, and a girl who often speaks in a blunt and straightforward manner. Simply due to her protagonist nature I would suggest a Medium to Medium-Low range female voice, but as said before all interpretations are welcome.