Jason and Lucia appear together in much of GTA 6's promotional material, but Rockstar intends to give players some room to influence their relationship. Rob Nelson discussed that possibility with Famitsu when talking about the pair's story.

Romance and partnership are not quite the same thing

Jason and Lucia together in an official GTA 6 image
Rockstar Games

Nelson described two ways to approach their partnership, as a couple or as two accomplices working together. Investing in the relationship unlocks displays of affection, including kissing and holding hands. An in-game indicator will also let players track how close the characters are.

This differs from GTA 5, where Michael, Franklin and Trevor's relationships were largely established by the narrative. In GTA 6, the pair remains central to the campaign, but the player's everyday experiences can influence their closeness.

In another interview, with IGN journalist Rachel Weber, Nelson said players could focus on the pair's romantic life or spend their time on criminal activities. The result places their relationship at the heart of the GTA 6 experience.