Susie's parents and elder siblings also make appearances in some episodes, and another major adult character includes Lou Pickles, Drew and Stu's father and Tommy, Angelica, and Dil's grandfather; an elderly widower who later remarries with an active woman named Lulu. Didi's parents, Jewish immigrants named Boris and Minka, also appear numerous times and serve as important characters and are often seen bickering. "Rugrats" also has animal characters, including the Pickles family dog, Spike, and Angelica's pet cat Fluffy. Spike played important roles, but most importantly was always ready to rescue Tommy when he was in danger.