Who are equalitys friends in anthem?

In Ayn Rand's "Anthem," Equality 7-2521's friends include International 4-8818, a fellow worker who shares a bond with him, and Fraternity 2-5503, who is also part of their collective society. International 4-8818 is particularly supportive and understanding of Equality's feelings of individuality. Together, they navigate the oppressive environment of their society, but as the story progresses, Equality becomes increasingly isolated in his pursuit of self-discovery and personal freedom.