Getting 2 actors to look in eachother's direction

I’m making a sidescroller fighting game and I’m trying to get the two characters to look in eachother’s direction but not actually rotate completely in eachother’s direction, as it looks really bad when one of them is jumping. How would I go about doing this?

If you just want their heads to turn you could use Fabrik IK

You should be able to figure out how from that video (even though video completely unrelated to what you are doing.)

If turning in air is the problem you may be able to disable turn look at at while jumping instead.