I'd figure I would share how I used the Fateship Romance/Rivalry incase anyone wanted something inspiration on how to use them. We have only used them in Alien RPG but plan to try them in a Kingmaker Pathfinder campaign. Alien has a buddy rival system. We use these for the players to make connections with themselves and NPCs that could make differences in life or death situations. Sometimes between each other. Rarely has it gone to Romance, but we usually take it to best friends as it doesn’t always mean the incident has to be romantic. For example, a rival may lock you in a room with a xeno to save themselves or in an extreme case save you just to laud it over you. A buddy may be willing to look the other way, or even help a little when you go against the corpos. A best friend or romantic partner may be willing to take a bullet for you. It's a pretty simple add to any campaign. We do it mostly during in-game downtime usually during what you would call a normal day for the character.