Progress the main story until Rosa becomes available as a romance option
Complete Rosa’s questline and all required dialogue scenes
Choose supportive, respectful, and flirtatious dialogue options with Rosa
Help Rosa with her personal quest objectives
Avoid insulting, threatening, or dismissive responses toward Rosa
Accept any romance-related invitation or private meeting she offers
Complete all required companion or side activities tied to Rosa
Select the romance-specific dialogue choice when it appears
Do not pursue conflicting romance options if the game locks you out
Finish the required story segment to trigger the romance payoff