Hey there let me answer them for you.
1. 5 or 6 chapters.
2. Her name is Samara, she has a meek personality.
3. Because he does not like humanity on general. The game will help you understand why though.
4. I am not the author of the narrative so I cannot speak to influences. Erk likes to keep to himself about all that stuff.
5. That people can get past playing a protagonists who who is designed to be unlikable.
6. Voice acting is limited in the game. But if we find the money to do more of it we will likely use actors who can deliver larger quantity of work.
Hope that helps!