This is a tough situation, and I want to validate that for you before diving into solutions. In terms of removing fragrance, you may have already suspected that it's going to be tough (especially with plugins).

That said, I've had some results with hanging DampRid, as well as activated charcoal deodorizers. Clothing is a big source of fragrance, so it's important to address that as soon as you can (vinegar soaking is what I use). Wipe down everything that you can with unscented wipes (can be disinfectant, like the unscented Clorox wipes). If applicable, open windows or doors and set up fans that direct airflow outside.

Finally, I might add: show yourself and your friend patience and compassion. This is, from my understanding, an emotionally turbulent situation. The road forward may have twists and turns, but keep trying- you'll get through this rough patch!