Olyvar

"I'm wildly expensive."

- Olyvar to Oberyn Martell

Olyvar is a recurring character in the third, fourth, and fifth seasons. He is played by guest star Will Tudor, and debuts in "Kissed by Fire". Olyvar is a spy and a prostitute in the employ of Petyr "Littlefinger" Baelish, specializing in homosexual relations.

Season 3
Olyvar poses as Loras Tyrell's squire during a sparring match. He makes flirtatious advances toward Loras and the two later have sex. Olyvar discovers that Loras is due to be married to Sansa Stark, and relays this information to Littlefinger shortly thereafter. Olyvar implies that noblemen in Loras' position make up the bulk of his clientele.

Season 4
Olyvar has been left in charge of Littlefinger's brothels, presumably replacing Ros. When Oberyn Martell and Ellaria Sand arrive in King's Landing, they visit the brothel and Olyvar presents three prostitutes to the couple. After Ellaria chooses one and dismisses the other two, Oberyn turns his attentions to Olyvar. The latter protests that he's not on offer, before giving in and admitting he's just "wildly expensive". Oberyn asks if Olyvar has ever been with a prince before, orders him to remove his clothes and grabs him by the crotch. However, they are interrupted when Oberyn overhears a pair of Lannister men singing "The Rains of Castamere".

Olyvar later takes part in a small orgy involving Oberyn, Ellaria and two other prostitutes. When the latter attempts to "share" him with Oberyn, Olyvar politely refuses her, claiming to have "not acquired the taste" for women. He then presses Oberyn to divulge his own preference. The Prince, however, explains his rather fluid approach to sexuality, a common trait among the Dornish. Olyvar and the other prostitutes depart when Tywin Lannister unexpectedly arrives to speak with Oberyn.

Season 5
Olyvar continues to see Loras on a regular basis, though it's unclear if their arrangement is personal or professional. Around the time of Tywin Lannister's funeral, Olyvar is cuddling with Loras Tyrell post coitus, discussing the possibility of visiting Dorne or anywhere far away from King's Landing, when Margaery walks in. Staring down Olyvar, she admonishes Loras for making them late for supper with King Tommen, and tells Olyvar to leave.

Olyvar later plays the role of the Father with a fake beard when the High Septon visits the brothel, while a collection of female prostitutes play the rest of the Seven. He breaks character to make a snide remark about the High Septon's choice, and to remind him that two prostitutes will cost him extra. Moments later, the brothel is attacked by Sparrows, led by Lancel Lannister, who seize the High Septon. Olyvar attempts to tell them that they will have to answer to Baelish, but they strike him across the face and remove his fake beard.

Olyvar is present when the brothel is attacked again by the Sparrows, this time having formed into the Faith Militant with Cersei Lannister's permission. Again, he is struck when he tells them they will have to answer to Baelish, but this time, the Faith Militant have targeted the brothel's homosexual patrons and prostitutes who have been caught in the act. Since Olyvar is fully clothed, he is not suspected of homosexuality, and is able to flee the brothel when he sees the Sparrows castrate both the homosexual patron and the prostitute.

Olyvar is later called to give evidence at the "Holy Inquest" of Loras, who is accused of "fornication", "buggery", and "blasphemy", though it is clear he is doing it on Cersei's instructions. Despite their previous, affectionate relationship, Olyvar turns on his lover, and provides the High Sparrow with testimony that allows him to pursue formal charges against Loras, who attempts to attack Olyvar but is restrained. Olyvar's testimony also leads to Margaery's arrest for perjury, despite Loras and Margaery both denouncing Olyvar as a liar.

Later, during a meeting between Lady Olenna and Petyr Baelish, Baelish reveals that Cersei summoned him back to King's Landing for "a piece of information" he had, revealing that Cersei forced Baelish to give up Olyvar so she could build up a case against Loras and Margaery. He tells Olenna that he will give her the same thing he gave Cersei: a handsome young man —implied, in this instance, to be Lancel.

Behind the scenes
In the books, Loras Tyrell is left deeply mourning the loss of his great love Renly Baratheon, and famously swears that he will never love again, saying "When the sun has set, no candle can replace it." Several critics including Westeros.org were upset that Loras has sex with Olyvar in "Kissed by Fire", because it seemed rather sudden, as if Renly's death did not deeply impact him. Writer Bryan Cogman, however, subsequently did an interview with Westeros.org, and specifically addressed this concern: changes in adaptation meant that Loras had to have sex with Olyvar, to let it slip that he would marry Sansa, as part of the plot mechanics of the Lannister/Tyrell rivalry. However, Cogman explained, his earlier drafts of the episode actually included longer scenes which made it explicitly clear that Loras is not finished mourning Renly. Rather, Loras was very depressed and lonely, and in effect "drowning his sorrows" by engaging in casual sex in the hope that it would make himself feel better, but it ultimately made Loras feel more emotionally distraught and reminded of how much he misses Renly. Cogman lamented that "as we get closer to production a lot of trims have to be made and this scene was one where I had to do that," and he acknowledged that cutting the scene gave the unintended impression that Loras was moving past Renly, when he actually isn't.

Olyvar appears to have taken over Ros's duties both in-universe and behinds the scenes: he has taken over her management duties at the brothel, and has taken her narrative role as the "go-to" prostitute character present during illicit goings-on in King's Landing.

In the books
In the A Song of Ice and Fire novels, there is no prostitute named Olyvar. At first, the character in the series assumes part of the role of Dontos Hollard, who obtains the information not from Loras Tyrell but from Sansa Stark herself, who is unaware that Dontos works for Littlefinger. Later in the TV series, when Cersei gives Olyvar to the Faith Militant so that he admits to sleeping with Loras Tyrell, he is taking the role of the Blue Bard, a singer in Margaery's retinue, whom Qyburn - under Cersei's orders - tortures into accusing her of fornication and sleeping with other men as well (all false charges).