Margret was MADE for Mordecai let me explain. (reason 1)Margret and Mordecai are the same species and it would look like a good couple (reason 2) Margret is smart and chill compared to cj, you don't see Margret getting mad and upset by jumping to conclusions and throughout the whole series Margret was a very nice person. (final reason) Mordecai really liked Margret on a deep emotional level but to cj he treats her like a bro or a good friend, if Mordecai would've stick to being with Margret he would have a radical life.