To all appearances this guy's best friend is a droid, and while K-2 is awesome, human contact is still kind of important. Just give me loner Cassian who melts when a friend/lover touches him gently because he's finally getting something that even he didn't realize he needed so much.
+If he's twitchy about people touching him due to trauma/heightened startle response from his life as a spy, so he's torn between instinctively moving away and PLEASE NEVER STOP ++If he's kind of embarrassed by the strength of his own response +++If he's not good at articulating that he wants to be touched and/or wants it to continue - might even be stiff and awkward so it seems like he doesn't like it - but the other person eventually figures it out
Touch-starved Cassian
+If he's twitchy about people touching him due to trauma/heightened startle response from his life as a spy, so he's torn between instinctively moving away and PLEASE NEVER STOP
++If he's kind of embarrassed by the strength of his own response
+++If he's not good at articulating that he wants to be touched and/or wants it to continue - might even be stiff and awkward so it seems like he doesn't like it - but the other person eventually figures it out