A Storm of Swords (mentioned)|
A Feast for Crows (mentioned)
Appearance and Character
Dennis is a big man with a thick neck and a red face.
A Storm of Swords
Dennis and his brothers, Ser Peter and Ser Harwyn, are among the men sent by Lord Tywin Lannister to the riverlands in search of his son, after Ser Jaime Lannister has been released from Riverrun by Lady Catelyn Stark.