Desumi Magahara is a central character from the anime series 'Koi wa Sekai Seifuku no Ato de' (Love After World Domination). She is a member of the villainous organization Gekko, where she holds the title of 'Reaper Princess.' Despite her role as a villain, Desumi is kind-hearted and compassionate, which is highlighted by her secret romantic relationship with the protagonist, Fudou Aikawa, who is a hero in the opposing organization, Gelato 5. The series explores the comedic and romantic challenges they face as they try to keep their relationship hidden from their respective groups while navigating their feelings for each other.