King Dorephan is a character from The Legend of Zelda: Breath of the Wild. He is the King of the Zora and reigns over the Zora's Domain in the Lanayru Great Spring region. He is the father of Princess Mipha and Prince Sidon. He is known to have reigned over the Zora for over one hundred years making him the longest known reigning King Zora in the history of the series.
One hundred years prior to the game's events, King Dorephan was the King of the Zora, and father of Princess Mipha and Prince Sidon. His eldest daughter was selected by Princess Zelda and King Rhoam Bosphoramus Hyrule to be one of the Champions to aid Princess Zelda and her appointed knight, Link in the battle against Calamity Ganon. Mipha was selected to pilot the Divine Beast Vah Ruta, however Calamity Ganon corrupted the divine beasts and Mipha was tragically killed by Waterblight Ganon. The hero Link was injured and placed within the Shrine of Resurrection to heal while Princess Zelda used her power to seal Ganon within Hyrule Castle.
At some point before the game's events, King Dorephan wrote down the history of the Zora on ten stone monuments; finding these are the objective of the side quest "Zora Stone Monuments". One of these monuments reveals that one century after ascending the throne, a stray Guardian, under the control of Calamity Ganon, wandered into Zora's Domain and seemed unstoppable as not even the best Zora soldiers could damage it. Without any fear for his own safety, Dorephan confronted it himself and used his supernatural strength to throw it into a ravine which shattered the Guardian into pieces. Dorephan received the scar on his forehead as a result of that battle.
As Zora have longer lifespans than Hylians, Dorephan continues to reign over his people one hundred years after his daughter's death with the assistance of his youngest child and only remaining heir, Prince Sidon. When corrupted Vah Ruta reappears, King Dorephan remains in Zora's Domain while his son searches for someone capable of assisting them in regaining control over the beast as the rain it produces threatens to cause the East Reservoir Lake to overflow which would flood Zora's Domain and threaten the rest of Hyrule.
He is shocked when he learns that Link had survived the Great Calamity and has not aged at all. As Link has lost his memory, he explains the Zora's history. He supports Prince Sidon's plan to have Link help them regain control of Vah Ruta, despite opposition from his royal advisor and most of the Zora Elders. They hold Link and the Hylians responsible for the Great Calamity and Mipha's death, but Dorephan and Sidon do not agree and consider it at all. The king offers Link the Zora Armor which his daughter had made. One of his monuments reveals his regret over permitting Mipha to join the Champions and pilot Vah Ruta, stating he would have never accepted if he knew it would result in her death. However as a wise ruler, he still holds Link in high regard due to his role in saving Zora's Domain in the past from a Lynel, his Champion status, and out of respect for his daughter Mipha who had feelings for Link. Like the King Zora that came before him, he considers the Royal Family of Hyrule his allies and takes his people's oath to watch over the water level of East Reservoir Lake seriously to protect Hyrule from flooding.