There will be character customization so you make your own.
No, we cannot specifically make our own character facial appearances. They are determined by our character's parents genes. We select from a pool of "parents" (mother and a father) and use the two parents to formulate the appearance of our character. We can then choose which parent we want our character to look like the most.
So I can take Claude Speed as my father and Misty as my mother. I can then put it to where my character takes up 60% of Misty's (mother) look and 40% of Claude's (father) look and then the game would generate the face of my character based off of that. Before we do this we can of course choose our sex of male or female.
We will then choose how we live our daily life such as spending most of the time watching tv or most of the time doing physical activities. This will determine the body size of our characters such as being fat, skinny, muscular etc...
The only thing we can specifically choose on our own is the clothes/hairstyles/tattoos and such.