The latest stable changelog update came along with new features for user profiles where it should be possible to add an About me text along with a custom background. However, it was not yet available on Android to everyone back then and this feature was rolled out gradually afterwards.
Nitro users also will get a bonus here that allows them to set their own profile background instead of a plain colour option that comes for free.
Discord - Talk, Video Chat & Hang Out with Friends - Apps on Google Play
Your place to talk, video chat, and hang out with friends and communities.