Who is Hand of The King in House of The Dragon?

[Herbert Playz]

Otto Hightower is Hand of the King in House of the Dragon. His daughter is Alicent Hightower who is a close companion of princess Rhaenyra Targaryen. House Hightower wasn't featured prominently in Game of Thrones but they are an extremely wealthy, influential and powerful house in the seven kingdoms. Oldtown (the second largest city in the realm) and the Citadel(the place where maesters go for training) lie within their realm.