From A Wiki of Ice and Fire
|Personal arms||Per cross blue and white shield, a quill and a hammer crossed|
|Book||The Hedge Knight (mentioned)|
Ser Michael Miller was a knight during the reign of King Daeron II Targaryen.
Michael participated in the tourney at Ashford Meadow in 209 AC.
Behind the scenes
The character is named after Michael Miller, the penciler for the graphic novel adaptation of George R. R. Martin's Dunk and Egg.