Orwyle

Orwyle was Grand Maester during the Dance of the Dragons.

History
Orwyle was the Grand Maester during the final days of the reign of King Viserys I Targaryen. Upon the death of the King, Orwyle was present in the meeting in which Queen Alicent Hightower, Ser Otto Hightower - the Hand of the King - and Ser Criston Cole, the Lord Commander of the Kingsguard, force the small council to crown Prince Aegon regardless of Princess Rhaenyra Targaryen being the designated heir. Orwyle witnessed the death of Lord Lyman Beesbury - who remained adamant in crowning Rhaenyra - at the hands of Ser Criston.

In the books
In the A Song of Ice and Fire novels there's no mention of Grand Maester Orwyle, who appears in The Princess and the Queen and The World of Ice and Fire. He succeeded Grand Maester Mellos in the year 127.

After Rhaenyra seized the Red Keep during the Dance of the Dragons, Orwyle was imprisoned in the black cells, where he wrote his account of the war, trying to put himself in the best light possible, uncertain if he would survive or not. In contrast to Eustace's pro-Aegon II writings, Orwyle's account was likely slanted in Rhaenyra's favor. Grand Maester Munkun based his The Dance of the Dragons, A True Telling in Orwyle's already biased account.