A company car comes with a specific kind of constraint most personal vehicles do not: you did not choose it, you probably cannot modify it, and at some point you will hand it back exactly as you received it. That does not mean you have to spend forty hours a week in a cabin that feels like nobody's, including yours.
Most personalization options are off the table for a reason. Aftermarket accessories, seat covers, anything that alters the vehicle, usually violate a fleet policy or simply are not worth the effort on a car you will not keep. What is left is a surprisingly short list of upgrades that add zero risk and zero permanence, and a hanging fragrance sits right at the top of that list.
Nothing installed, nothing that marks the interior, nothing that would raise an eyebrow at a fleet inspection or a return. Just something that changes how the space actually feels for the person spending the most time in it, which, on a car you are driving for work every day, is a meaningfully large chunk of your week.
There is also a professional upside worth naming. If clients or colleagues ever ride along, a company car that smells considered rather than institutional quietly reflects on you specifically, not just the fleet policy that assigned it. A car that feels like nobody's rarely leaves a great impression on anyone who steps into it.
You did not choose the car. You can still choose what it feels like to be inside it, five minutes and one decision at a time.