Derradja is a word of arabic origin meaning a person assigned as an admin in an online community such as a Facebook Page or Group, with the main role of deleting and banning community members who go against the rules set by the admins and moderators in charge of that community.
Diarra is a funny, kind, caring, loving/loveable person. She can be a bitch at times, but she's always there to make it up to you. If you come across a Diarra you should befriend her! There aren't many like her; she's one of a kind.