Trials and Tribulations of the Oathkeeper

Daveth Baratheon is the eldest son of King Robert Baratheon and Queen Cersei Lannister. Known far and wide throughout the Seven Kingdoms for his famous reputation as "the Oathkeeper", how will the Young Stag's presence affect the Game of Thrones? [OC/Sansa]. A few tidbits included from the Song of Ice and Fire novels, but the rest is primarily from the HBO TV series.