Roger-
You help expand Roger's creativity, leading to better music
David-
You help David with his anger management, helping create a better relationship between him and the rest of the band
Rick-
You helped Rick to open up and not be so shy
Nick-
Nick feels like he sometimes doesn't have a voice in the band, but you help his confidence grow and help him to tell the band when he doesn't like something
Syd-
You help Syd with his insecurities