Callie isn't very mellow...she is extremely demanding and into everything. She meows/cries constantly but she is absolutely perfect. I couldn't have asked for a better personality--none of my cats like back scratches (the real hard kind where you go up and down the spine) more than her, she does this sweet little noise whenever she is getting really good lovins' (rrrrooowwww), she loves to wrestle with her brother, run throughout the house at 4 AM and sound like a pack of wild horses..I so love her!