Also, if I may provide some suggestions that I'd LOVE to see in the game, add some form of conversations to have with her.
SHE DOES NOT NEED A VOICE OVER! There are some wonderful graphic novels that are very good without a single voice over.
But I would love to see her having the ability to talk to the player. And these conversations should vary based on how the player's response is and what she thinks of the player, and what time of the day it is.
For example:
If she is fond of the player and it's in the evening, she may ask how the player's day is. If the player responds upset, she will express worry and maybe try and console the player.
And if it's lunch time for the player, she may ask what the player is going to eat.
If it's in the dead of night, she might ask the player why he/she is up.
Also, with adding these, the player should be able to have a name so she can address them correctly. Also, give her some reactions if the player uses certain names. Most obvious if the player chooses to have their name as either an insult, or literally Wooly's name.