or I think even better would be making a mix by populating the mansion’s first floor with more desires in designated rooms who would say random things when talked to (the same stuff i mentioned in the above comment, like good morning, what theyre doing, how theyre feeling, etc), in addition to truly random events which can be like the random house events triggerable currently but instead like someone comes bumping into you, or someone running and yelling at someone else because they stole their clothes, or you stumble across someone doing something like sleeping, etc? I kinda like this way because then the idea of the desires becoming friends could also be shown as what they say changes as affection and relationships with others, messages like, I never realised ____ was into cooking too! He/she has been teaching me a lot, etc etc. Also maybe it can change for different times of the day, like which desires are out, what they say, etc!
You could also do stuff with desires that are shy or lonely like oliver, and building their relationship makes them come out of the room and maybe make friends?