Simone Argo's Links
She is one of many Dealers for the Organization and has constant contact with Mercedes. While she likes and tolerates Mercedes well, she isn't super buddy-buddy with her given she's under constant stress from the org to be ready at all hours even sometimes while she is at her actual job as a Nurse. She did have an intimate encounter with Mercedes once however she did make it clear this was only a one-time thing which Mercedes has since respected and because of that respect she's shown Simone has since considered her more of a friend than a coworker.
She is the drug manufacturer for the organization and has constant contact with the Dealers one of whom is Simone, with whom she has a friendly relationship albeit a little surface-level. While they aren't super close Mercedes views her as one of her best friends. Given Simones's title and Rep, she has had a bit of a one time intimate encounter with her.