King Robert Baratheon
Betrothed to Lyanna Stark
Father of Prince Joffrey Baratheon
Princess Myrcella Baratheon
Prince Tommen Baratheon
Derryk
Gendry
Renly Baratheon
Robert Baratheon the ruler of the Seven Kingdoms and holder of the Iron Throne. He took the throne by conquest in the war known as Robert's Rebellion. Robert was betrothed to Lyanna Stark, Eddard's sister, however she was kidnapped by Prince Rhaegar Targaryen. Lord Brandon Stark marched to King's Landing demanding her return however Brandon was imprisoned and Lord Rickard Stark was then summoned to the Mad King's court and both were executed. This sparked a massive uprising against the Mad King led by Robert, Eddard and Jon Arryn. Robert claimed the Iron Throne because he started the war and killed Prince Rhaegar personally.
After the war, Robert married Cersei Lannister to cement an alliance with House Lannister. Robert found the winning of his kingdom far more fulfilling than the running of it. So it is his Small Council that is delegated the tedious tasks of ruling.