Weaknesses: Unreliable Luckamancy
First Appearance: LIAB Text 39
Captain Archer is an Archer Warlord on the side of Gobwin Knob. He serves as Lady Sylvia Lazarus's second in command when Gobwin Knob's normal leadership is thrown into dissarray. He fires the shot that croaks Artemis. Later, he tries to take Spacerock's garrison by defeating every Jetstone unit they can find.
He is ultimately done in by a combination of Fate and Lady Sylvia's Carnymancy charm redirecting her bad Luckamancy at him. When he goes after King Slately and croaks Count Downer, he is noticed by Jetstone's Dollamancer, Ace Hardware. Ace Hardware proceeds to redirect his attacks at Sylvia to him. He is ultimately dusted by a boulder thrown by one of Ace's cloth golems.
It's unclear, if "Captain" is the character's name, but it probably is just a rank. It would be surprising if the character's full name was just "Archer".
Real World Reference
The name "Captain Archer" is a reference to Captain Jonathan Archer from Star Trek: Enterprise. As of his first appearance in colour on LIAB 86, it seems clear that his physical appearance is based on Scott Bakula, who played Captain Archer in star trek.
The character's clothing and profession are drawn from Archer from Fate/Stay Night.