Fink, Iago, JUDAS, and DELILAH are all characters in literature and mythology who have betrayed someone. FINK is a term used to describe an informant or someone who betrays their friends or colleagues. Iago is a character from Shakespeare's play Othello who betrays his friend Othello. JUDAS is a figure from the Bible who betrayed Jesus Christ. DELILAH is a character from the Bible who betrayed Samson by cutting his hair, which was the source of his strength.