In "Captain Alatriste," author Arturo Pérez-Reverte explores the complex character of Diego Alatriste, a skilled swordsman and mercenary in 17th century Spain. One of Alatriste's most notable traits is his ability to form friendships even in dire circumstances, making the quote "It was one of Diego Alatriste's virtues that he could make friends in Hell" particularly significant. This highlights not only his charm and resilience but also his adaptability in a world filled with danger and moral ambiguity.

The narrative reveals how these friendships shape Alatriste's journey, influencing his decisions and encounters. Through his interactions with various characters, the story delves into themes of loyalty, honor, and survival. Alatriste navigates a treacherous landscape where alliances can be both a boon and a curse, illustrating the complexities of human relationships in a brutal era. Ultimately, his ability to connect with others, regardless of their backgrounds or circumstances, underscores the depth of his character and the intricacies of the world he inhabits.