Nymph is an "Electronic Warfare Angeloid, Type Beta" (電子戦用エンジェロイドタイプβ（ベータ）?). She is introduced when she finds Ikaros on an errand and attacks her, then later mysteriously appears in Tomoki's living room where she casually snacks on chips. She has a condescending attitude towards humans, whom she refers to as "bugs", and she calls Angeloids by their types rather than their names, for example, she calls Ikaros "Alpha". Despite the attitude, she starts enjoying everyday life and her favorite hobby is eating snacks and watching soap operas.
Nymph's original mission is to retrieve Ikaros and return her to Synapse, however, she is physically weaker and fails to the mission after awakening Ikaros's Uranus Queen ability, and is consequently heavily punished and abused. After spending time with Tomoki and his friends, she begins to like humans, and soon develops feelings for Tomoki, albeit in an aloof fashion), Nymph eventually betrays Synapse: in the manga she tries to surprise attack the Harpies, while in the anime she sides with Ikaros. In both cases, her wings are consequently ripped apart by the Harpies, but Tomoki and friends manage to free her link to her master. The wings regenerate when she accepts Tomoki as her new master. However, after the regrowth, Nymph needs to go through the Imprinting process required for her master; she eventually asks Tomoki, but he refuses and states that he wants her to live freely.
As an Electronic Warfare-type Angeloid, Nymph's allocation of abilities emphasize her high processing capabilities and high emotional control, but her raw battle power is set low. Nymph is able to hack computer systems as well as other Angeloids and even humans. She uses a device called the Dive Game which enables humans to enter each other's dreams and through Tomoki's dream, visit Synapse. Her "Stealth" wings appear sheer, unlike Ikaros's wings which can only retract to stubs, and she can use this as a radar. She can also fire a high-powered energy beam from her mouth called "Paradise Song" (パラダイスソングParadaisu Songu?). During the battle with Angeloid Hiyori, Tomoki's encouragement allows her to upgrade her powers to Aphrodite(アフロディーテAfurodīte?), a "fundamental particle-jamming system" that she uses to hack and free Hiyori.
