The song "Resonance" is a track from the anime series Soul Eater, originally released in the key of C minor. It was composed by Toshiyuki Omori and performed by T.M.Revolution, a Japanese pop rock band. "Resonance" was selected as the opening theme for the first 13 episodes of the series. The song gained popularity for its energetic and catchy melody, accompanied by powerful vocals. A fun trivia about this song is that T.M.Revolution's vocalist, Takanori Nishikawa, is also known for his cosplay and stage presence, which further added to the excitement and fandom surrounding "Resonance".