Nightwing
Nightwing is a fictional superhero appearing in American comic books published by DC Comics. The character has appeared in various incarnations, with the Nightwing identity most prominently being adopted by Dick Grayson when he moved on from his role as Batman's vigilante partner Robin.
Night Wing
"Night Wing" is Kudo's first single to be released as a double A-side, with "Yukigasa". Her 1998 single, "Kirara", and its coupling song, "In the Sky", received a similar treatment, but was never officially released as such. "Night Wing" was written and composed by Miyuki Nakajima, and arranged by Ichizō Seo. The song marks Kudo's first collaboration with Nakajima in two years, since "Clāvis (Kagi)". It is described as a powerful midtempo song written by an invigorated Nakajima. Lyrically, the song describes a protagonist metaphorically "spreading her heart-shaped wings and soaring through a windy sky" and ambiguously pondering about her contradictory actions and mixed feelings. The song is composed in the key of A-sharp minor and Kudo's vocals span from G to A.