Ikaros is a central character in the anime series 'Sora no Otoshimono'. She is an Angeloid, a type of artificial being with wings, who descends from the sky and becomes bonded to Tomoki Sakurai, the protagonist of the series. Ikaros is characterized by her emotionless demeanor and incredible power, which gradually becomes more nuanced as she develops emotions and attachments. Her role in the series revolves around her relationship with Tomoki and the other Angeloids, as well as her quest to understand human emotions and her own identity.