Ser Otto Hightower is the younger brother of the Lord of Hightower, and the father to Queen Alicent Hightower. He was Hand of the King to Jaehaerys I Targaryen and Viserys I Targaryen. Initially, he was supportive of Rhaenyra Targaryen as Princess of Dragonstone. However, when his daughter married Viserys and produced sons, he began petitioning for Aegon Targaryen to be named heir. This eventually led to him being removed from his position. He was reinstated just before Viserys' death, and he helped stage a coup of the Iron Throne that plunged the country into the Dance of the Dragons.

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