Morrigan doesn't cry. Okay, yeah, she does. Just where no one can see it. She did, however, cry more when she was younger before Flemeth beat that habit out of her. And, knowing Flemeth, most likely that's literally. She did find a nice little corner and sulk after*THE FOLLOWING SMALL STRIKE TEXT IS MAJOR SPOILERS* she found out that Flemeth was only raising her so Flemeth could kill her and use her body to expand her unnatural lifespan. This was of course done where no one could find her.

Terra sorrows a lot but crying? Not so much. But she would cry if something terrible (like death) happens to someone she knows/cared about. She probably did cry over the death of the Espers.