石川由依 (ヴァイオレット・エヴァーガーデン) made "sister" available on October 21, 2020. With this song being around four minutes long, at 4:14, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. The track order of this song in 石川由依 (ヴァイオレット・エヴァーガーデン)'s "Letters and Doll 〜Looking back on the memories of Violet Evergarden〜" album is number 11 out of 13. sister is below average in popularity right now. Since there is more of a neutral sound being played, this makes the track somewhat danceable.

sister テンポ

We consider the tempo marking of sister by 石川由依 (ヴァイオレット・エヴァーガーデン) to be Andante (at a walking pace) because the track has a tempo of 87 テンポ, a half-time of 44テンポ, and a double-time of 174 テンポ. Based on that, the speed of the song's tempo is slow. Activities such as, yoga or pilates, can go well with this song. The time signature for this track is 4/4.

sister キー

B♭ Major is the music key of this track. This also means that this song has a camelot key of 6B. So, the perfect camelot match for 6B would be either 6B or 7A. While, 7B can give you a low energy boost. For moderate energy boost, you would use 3B and a high energy boost can either be 8B or 1B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 6A or 5B will give you a low energy drop, 9B would be a moderate one, and 4B or 11B would be a high energy drop. Lastly, 3A allows you to change the mood.