Related Information for He's My Brother She's My Sister He's My Brother She's My Sister is a band formed in Los Angeles, California. This folk group has been influenced by a wide range of genres ranging from pop, country, and punk among others.Formed by actual brother-sister duo Robert and Rachel Kolar, the group now consists of five members.Rachel Kolar (Vocals & Percussion)Rob Kolar (Vocals & Guitar)Lauren Brown (Tap Dancing Drummer)Oliver 'Oliwa' Newell (Upright Bass)Aaron Robinson (Slide Guitar)Playing over 150 shows i.. read more