'Follower' in the Bible

So Ahab summoned Obadiah, who supervised the palace. (Now Obadiah was a very loyal follower of the Lord.

But when I leave you, the Lord's spirit will carry you away so I can't find you. If I go tell Ahab I've seen you, he won't be able to find you and he will kill me. That would not be fair, because your servant has been a loyal follower of the Lord from my youth.

Now a wife of one of the prophets appealed to Elisha for help, saying, "Your servant, my husband is dead. You know that your servant was a loyal follower of the Lord. Now the creditor is coming to take away my two boys to be his servants."

You will not abandon me to Sheol; you will not allow your faithful follower to see the Pit.

No foreigner who becomes a follower of the Lord should say, 'The Lord will certainly exclude me from his people.' The eunuch should not say, 'Look, I am like a dried-up tree.'"