Both Bloom and Knightley focused on acting in live theater and smaller films after wrapping the trilogy, and have only appeared in a handful of tentpoles in the years since. Meanwhile, On Stranger Tides introduced a new pair of young heroes-turned lovers in the forms of Phillip Swift (Sam Claflin), an inexperienced but virtuous missionary imprisoned by movie's villain Blackbeard, and Àstrid Bergès-Frisbey as Syrena, a mermaid who is captured by Blackbeard and cared for by Swift, and later returned the favor by saving him after he's mortally wounded during the film's climax. Problem is, whereas Will and Elizabeth's courtship was central to the original Pirates of the Caribbean trilogy and the pair had actual arcs in all three films, Swift and Syrena's romance was largely inconsequential to the rest of the plot in On Stranger Tides, and the two received little in the way of real character development. Suffice it to say, the two didn't work as replacements for Will and Elizabeth.