You could group them, so they play the same thing. If you have a voice system setup, and they’re both connected to your Wi-Fi, you’d just need to append the name of your Ray (I.e Sonos, play x from Y on the Ray), and that should work.

You can not set up a Roam, or a pair of Roams, as surround speakers for the Ray. 
 

More info here:

https://support.sonos.com/en-us/article/set-up-sonos-voice-control

https://support.sonos.com/en-us/article/set-up-amazon-alexa-with-a-voice-enabled-sonos-speaker

https://support.sonos.com/en-us/article/set-up-the-google-assistant-with-a-voice-enabled-sonos-product