This Seeking Tech guide will explain how you can change your appearance and voice in Monster Hunter Wilds.
For the first step, select the Start Game option from the main menu screen.
Afterwards, you need to bring up the Edit Character menu by pressing Square on the PlayStation controller or X on the Xbox controller.
Next, you need to select the Edit Hunter option.
You should then be able to edit your looks and voice.
Once you are done with the editing, save the changes.