Character creation doesn’t just determine the aesthetic of your character in Once Human. Some aspects can influence gameplay stats, and you might not have noticed it when you created yours.
You can’t delete a character in Once Human if you have already created one, but you can change your appearance or try out other builds by crafting a Floor Mirror. You won’t be able to change the gender and you’ll have to spend one Chrysalis Token, however. If you want to start over your progress with a new character, you’ll have to choose another server—but your progress won’t carry over.