"I have only ever tried to embody what is good about this nation."
Played By: Christopher Egan
A counterpart to the biblical David. David is an idealistic young soldier who finds himself in the unfamiliar world of court intrigue after he wins national fame destroying a Goliath tank. Incredibly loyal to King Silas, David is not ready at all for what his idol is really like.
Hypocrite: Just using examples from the pilot, he proclaims that Jack cannot be gay because "we give up what we want when we want power" and, NOT TWO SCENES LATER, is revealed to still be in a relationship with the woman he truly loves (and, in fact, never stopped despite Cross thinking he gave her up to marry Rose) and has a child with her.
It's All About Me: Silas is the centre of his own universe, with the rest of the nation just revolving around him.
Narcissist: In Silas' mind, everything is all about him. This is why he can't regard David's secret relationship with Michelle as anything other than a personal betryal, and why he tries to kill David after God reveals David is to be the next king—he simply cannot process the idea that they aren't doing it just to hurt him. Even his affection for his children is based on their acting as extensions of his will; when they go against him, Silas again cannot see it as anything other than high treason.
Queen of Gilboa, a counterpart to the biblical Ahinoam, Rose is the wife of King Silas. The queen claims to abhor politics, but ruthlessly manipulates court life from behind the scenes.
The Chessmaster: Despite her repeated insistence that she doesn't like to get involved in politics, Rose manipulates nearly everything from behind the scenes.
The Cynic: "Desire for comfort overcomes desire proper and the chairs here are very comfortable. I picked them myself."
Mama Bear: When asked if she would accept the death of her brother for the salvation of her children (the cutting of a poisoned limb to save the body), she says without hesitation, "Cut and cut again until there is nothing left but my children."
Hypocrite: Her picture quote about lies is, of course, a lie - her own daughter was shocked to find she promotes art as a maneuver instead of an earnest love of ballet, everything she does is politics despite her proclaimed hatred of it, and she slaps her son for being honest about being gay immediately after saying that quote.
Princess Michelle Benjamin
"I already live with God's disappointment; I can't live with my father's."
Played By: Allison Miller
Princess of Gilboa, a counterpart to the biblical Michal. Silas's daughter and crusader for improving the kingdom's health care system, Michelle finds herself drawn towards David.
Rebellious Princess: Her fight for healthcare reform and her relationship with David are just some of the actions Michelle takes that her royal parents do not approve of.
Royals Who Actually Do Something: Michelle literally swore a vow to God to Actually Do Something and, as such, campaigns like clockwork to have her healthcare reforms approved.
Too Dumb to Live: Michelle falls into this trope with such stunning regularity that it's amazing she survives a season.
Prince Jonathan ‘Jack’ Benjamin
"The truth doesn't get any easier to tell - it only gets harder, until it's gone forever."
Played By: Sebastian Stan
Crown prince of Gilboa, a counterpart to the biblical Jonathan. Jack is Silas's ambitious and frustrated son, who initially sees David as a rival at court. Jack plays the role of a dissolute, womanizing rake in front of the kingdom's press, but is secretly gay. The king knows that Jack is gay, and challenges him to restrain his desires if he wishes to become king.
Depraved Homosexual: Subverted with Jack. He's both gay and a pretty bad guy, but the one thing has nothing to do with the other, and most of his Pet the Dog moments come when he starts to come to grips with his sexuality.
Hidden Depths: Starts out an apparently womanizing, carefree party boy; turns out to have a Morality Pet in the form of Joseph, a heart capable of being broken, and intelligence to go with his ambitions.
Even Evil Has Standards: Is genuinely shocked when Andrew leaks nude photos of Michelle to the press, and demands to know why he want to hurt his cousin like that.
Evil Uncle: To Jack, who he is using, and Michelle, whose birthright he intends to help Jack steal.
War for Fun and Profit: His control of money has an enormous effect on the cessation or continuation of the war.
Gen. Linus Abner
"I would rather fall on my sword than lay it down."
Played By: Wes Studi
A counterpart to the biblical Abner, is the head of Gilboa's military. Though initially loyal to the king, Abner eventually betrays Silas as he believes the king has become too 'soft'; in the episode "Brotherhood" Abner is killed by Silas for his betrayal.
General Ripper: Hates Gath and will do anything for the war to continue.
Played By: Sarita Choudhury
A counterpart to the biblical Rizpah, King Silas's mistress and mother of his illegitimate son. Silas attempts to offer up his relationship with Helen as a sacrifice to God in order to save his son's life, but eventually returns to her
"I broke his favourite thing."
Played By: Macaulay Culkin
The son of William Cross and nephew to the king, who was exiled from Gilboa for unspecified reasons, but has returned as part of a deal between Silas and William. He plays a role in his father's attempted coup, eventually betrays him to Silas, and is last scene freeing Vesper Abaddon.
The Sociopath: To appropriate Terry Pratchett, Andrew sees things differently from the rest of the characters, in that he sees the rest of the characters as things. Even his own father is disposable, in his eyes. He's also got the lack of affect, shallow emotions, intense boredom, impulsive behaviour, and screwed up sexuality that is typically associated with the trope and the diagnosis.
The former King of Carmel, Vesper Abaddon is kept sealed in the dungeons by Silas, who occasionally consults him on political matters. Befriends David in prison and is freed at the end of the series by Andrew Cross.