"Warrior" (Korean: 워리어) is a song recorded by South Korean idol group B.A.P. It is released as a Digital single on January 26, 2012 through TS Entertainment. The song served as B.A.P's debut single, the first from their self-titled debut album. "Warrior" was written and composed by Kang Ji Won and Kim Ki Bum the same composers of Song Jieun's Going Crazy and Bang & Zelo's "Never Give Up". B.A.P's leader, Bang Yong Guk also participated in the song's production by co-writing "Warrior". The song's lyrics describes the injustice of the current society and how the protagonist's desire to end it.

The choreography of "Warrior" was created by Park Sang Hyun who also choreographed Secret's "Magic", "Shy Boy" and "Starlight Moonlight". The song's music video was directed by Hong Won Ki. "Warrior" was lauded by various media outlets and netizens for its powerful and fierce imagery on its music video and live performances.

On January 8, 2011, B.A.P aired its fictional documentary show entitled Ta-Dah It's B.A.P on SBS MTV. The documentary is based on the story of how six alien beings (B.A.P), who decide to become singers in order to dominate Earth, deal with adapting the life of a K-Pop idol. Early episodes of the show featured behind the scenes footage of B.A.P's recording session and music video set of "Warrior". On January 18, 2012, TS Entertainment announced that "Warrior" will be the name of their debut song. On January 19, 2012, TS Entertainment released the music video teaser for "Warrior". TS Entertainment wanted to debut B.A.P with a different musical direction unlike the "typical boy band route", thus coming up with the idea of dealing with the "heavy issues of our society". On March 26, 2012 B.A.P officially released "Warrior" on various online music sites. A representative from TS Entertainment described "Warrior" as "a feast of splendid and grand sound combined with heart-throbbing rap and vocals.”

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