Flavius is Timon’s Steward, and the head of his household, and the man best aware of just how much his master spends.
The state of Timon’s accounts brings him to despair, as does his inability to get Timon to understand that he is essentially bankrupt and that giving costly presents to anyone who shows up for dinner is not really an option. Timon’s last barrier against his creditors, he is forever putting off the debt collectors while he tries to find the money to pay them back and get it through Timon’s thick skull that he is in serious financial trouble. He even goes so far as to ask the Senate for help in Timon’s name without being asked to; due to their refusal, he is skeptical of Timon’s belief that his friends will help him. Flavius dearly loves his master and is deeply loyal to him. When the money finally runs entirely out and Timon leaves Athens, Flavius gives what he has to his fellow servants and goes off to find his vanished master. This ends up making his fortune, but does not make him happy. Easily moved to tears, Flavius admires goodness and is rather depressed by how little there is of it in the world. He leads the Senators to Timon’s cave for the sake of Athens, but has no great hope of their success.