When logged into your account, click on Your Profile.
On this page, click on or scroll down to the Appearance section. In this section, you can edit things like your age range, gender interested in portraying, ethnic appearance, hair, eye color and other physical attributes.
These changes will only be reflected on the profile to which you’ve made changes. To make changes on any other profiles you may have, scroll to the top of the Your Profile page. If you have multiple profiles, you will see a profile switcher showing your personal profile and/or any represented profiles you have. Click on the switcher to select a profile, and you can edit your appearance details on each profile.