"Hmm." Andrew considers that as his hands move automatically, eyes monitoring what Zephyr is doing, too, as he considers the options. But, really, an answer is not that difficult to come up with.

"Perhaps a succulent. Haworthia, perhaps, or jade plant." Not quite cacti, but somewhat similar in how well they can do without care. "If you're more ambitious, possibly an evergreen, though they do tend to do best with daily watering."

But the scent of fresh pine can do a lot in easing other strong smells.