Secret-Keeper: Only person on the island who knows Sarah's a spy.
Sarah Stickney White (Cailtin O'Heaney)
The Chanteuse: She's employed as a singer in Louie's bar.
Femme Fatale Spy: Her mission is to keep an eye on Axis activities in the Marivellas for Uncle Sam, and uses her feminine charms to get what she wants.
Fiery Redhead: She's got red hair and the temper to match.
Sweet Tooth: Likes chocolate. It comes back to bite him whenever the dentist shows up...
Unsettling Gender-Reveal: In "Naka Jima Kill" the woman he's smitten with turns out to be a very male assassin.
Princess Koji (Marta DuBois)
Big Bad: Sort of. She does deal with the guest bad guys who show up every other week, but she's also Affably Evil towards our heroes, and is more a Punch-Clock Villain handling the dirty work for the Japanese government.
Villainesses Want Heroes: Has a noticeable crush on Jake... which upsets her samurai bodyguard Todo
Yellowface: She's clearly not Asian, implying she may have mixed blood through her mother. Todo, who is pure-blooded Japanese and a Samurai at that, still treats her as his princess adhering to traditional Japanese roles.
Anti-Villain: A German first, and a Nazi...not at all. He's far too friendly towards the people he's supposed to be spying on. He's actually glad to see Jake had survived a particular deadly incident where Tenboom feared his intel might have gotten Jake killed.
The Artifact: His double agent shtick is forgotten after the third episode.
Chivalrous Pervert: When he learns from one of his regular "blessings" recipients that her younger teen sister had been compelled to work for a brothel tent, Tenboom goes on a rampage to tear the entire camp down to rescue all the girls.
Dirty Old Monk: Develops a reputation for "blessings" among the native women of the island.
Even Evil Has Standards: While he offers a lot of "blessings" to a lot of island women, he still shows a healthy respect towards them... and gets mad when he finds out a visiting brothel had forced younger girls into prostitution.
Doesn't take his duties to the Reich very seriously.
He is forced in several episodes to actively spy for the Reich, which causes him a lot of personal stress.
Really Gets Around: The fact that he has so many "blessings" to give to the native women may have something to do with it.
Wrong Genre Savvy: He knows there's an American agent on the island acting against him... but he thinks it's Jake and has no idea the bar singer Sarah is his opponent.
Mysterious Past: And how! The little we do find out is that he's got a real tragic one.
Noodle Incident: Has several in his past, with only one to reveal itself when a friend who betrayed him during the First World War appears on the island, driving Louie to try and kill him the moment he sees him.
Papa Wolf: Willingly sends himself to the guillotine to protect his illegitimate daughter.
Todo (John Fujioka)
Bad Boss: Decapitates an oarsman for rowing too slowly.
Enemy Mine: With Jake in "Naka Jima Kill" against the Japanese Defense Minister's would-be assassin.
Everything's Better with Samurai: Only when he and Jake are forced to be on the same side. In every other situation, he's a deadly threat.
Jack the Dog (Leo)
Grumpy Old Man: From the Universe Bible: "think of Jack as an eighty-year old man who's seen enough of the world and ridiculous things people insist on doing to pretty much know what's coming next..."
