what role does the second person play in it?
He is bassist and lyricist
Pete Wentz
bassist and lyricist
how old is the lead singer of fall out boy He was born in 1984. when was the band formed? 2001 where is it based in? Wilmette, Illinois who all are it's members? The band consists of Patrick Stump, Pete Wentz, Joe Trohman, and  Andy Hurley.
wiki:12751405
Pete Wentz [SEP] Introduction
Peter Lewis Kingston Wentz III (born June 5, 1979) is an American musician, singer, songwriter, A&R consultant, author, and record executive. He is best known as the bassist and lyricist for the American rock band Fall Out Boy, since 2001. Before Fall Out Boy, Wentz was a fixture of the Chicago hardcore scene and was the lead singer and songwriter for Arma Angelus, a metalcore band. During Fall Out Boy's hiatus from 2009 to 2012, Wentz formed the experimental, electropop and dubstep group Black Cards. He owns a record label, DCD2 Records, which has signed bands including Panic! at the Disco and Gym Class Heroes.