McGillis is the proud owner of a rose garden (recently expanded!) so I feel like that practically begs for these two to get CR. He could use an extra hand with it and I think it could spark some interesting conversation. He would also be happy to lend a bit of the plot to her so she could grow her own flowers too.

In the interest of full disclosure, he's only sexually interested in men. But he'd probably still flirt with her anyway because 1) she's pretty and 2) he has a lot of surface level chivalry going on to disguise the fact he's kind of a primary antagonist, oops.