“Sister,” from Lenny Kravitz’s 1991 album Mama Said, is a soulful rock ballad with folk and R&B influences. Centered in D major, it features delicate fingerpicked acoustic guitar, subtle electric fills, and warm chord progressions that complement Kravitz’s expressive vocals. The song emphasizes melodic phrasing, dynamic control, and emotional depth, making it ideal for guitarists practicing fingerstyle rhythm, clean tone articulation, and soulful accompaniment in a reflective rock-soul context.