In the Time After Time Saga every hero and heroine has an animal helper. They aren't always the same book to book so I won't give away the future.
In Animal Instinct the helper to the woman of the Heartmark is Slainte' (pronounced slawn cha - and sometimes shortened to Cha Cha.) Slainte' is a Gaelic toast to health - and the real cat she was named for, which belongs to Lynette Endicott, needed all the health she could get when we rescued her.
The helper to the hero in Animal Instinct is his German shepherd K9 partner on the police force. He is named for the German Shepherd given to my family when I was in 3rd or 4th grade. Unfortunately no one knew how to train him or had the time, so the generous breeder who gave him to us took him back. Now that I am an adult dog owner I know that walking him and being consistent with his training would have given us a fabulous dog, but it was not to be.
Here are a few photos of the real life Slainte'. She is a feisty little thing who keeps the other cat and dog in line in a very intentional way. Notice her eyes are usually golden, not green. Tami Dee, the co-author on Animal Instinct, and Lynette recently discovered that both have rescued calico cats, although Tami's is much older. Their markings are very similar.
She is the only animal that Lynette's daughter's very lively beagle/bassett mix respects. She is smaller than the other cat but twice as feisty.