Sanguine, whose sphere is hedonistic revelry and debauchery, and passionate indulgences of darker natures.
The summoning date of Sanguine is 16th of Sun's Dawn. Sanguine can also be summoned in his shrine, if the summoner offered Cyrodilic Brandy.
When the Champion of Cyrodiil visited the Shrine of Sanguine and summoned him, sometime during the Oblivion Crisis, Sanguine tasked the Champion of Cyrodiil to join the royal dinner party of the Countess of Leyawiin, Alessia Caro. Sanguine believed that the Countess of Leyawiin was too stuffy, and wanted the champion to do something about it. The champion should sneak into the castle undetected and cast the spell of Stark Reality on her and her guests. When the champion cast the spell all the guests and the Countess herself were stripped, it brought chaos to the party, but Sanguine was pleased. When the champion returned to the shrine, Sanguine rewarded his Sanguine's Rose to the Champion of Cyrodiil. A staff that has capability to summon a lesser Daedra to "supposedly" fights for the wielder of the staff. Detail conversation of the event can be read here. The same artifact was also rewarded some decades before to the Hero of Daggerfall, and also to Martin, the last of the Septim. Martin in his youth was one of the followers of a Daedric Cult, and he somehow retrieved Sanguine's Rose - probably after some odd task.
Sanguine once was asked by Mephala for twenty-seven tokens she could give to her devoted followers. The Dark Brotherhood stole these tokens from the Morag Tong. According to Morag Tong member, Mephala eventually arranged for them to return to the guild. The Nerevarine systemically killed the member of the Dark Brotherhood one-by-one and retrieve back the tokens.