Given how popular Attack on Titan has been in 2013, there’s been a lot of fan works related to not only the series, but also the music. One notable example of music-related works has been the many arrangements of Attack on Titan’s OP theme, titled “Guren no Yumiya.” For example, you could hear this get a piano treatment at AnimeNZ and TehIshter’s concert called Attack on Piano concert.
While there are other examples, few of them match the fineries of this jazzy arrangement which sees the keyboards bearing most of the melody. It’s certainly light and stays mostly faithful throughout. Will this ever turn into anything on the level of a Platina Jazz? Well, the artists do have other works on their Youtube channel so you can definitely check those out to decide for yourself!