Salome, Mary Magdalene, Mary mother of James the less and Joses are women who helped Jesus. What did they do for Jesus while he was alive?

According to the gospels they ministered to him while alive. They were also among the first to know of Easter.

Source: Mark 15:40-41

This person was the only one left to help Paul in 2^nd Timothy. Who is this faithful helper?

Luke is this most faithful helper and companion of Paul.

Source: 2^nd Timothy 4:11