Baby
Cassandra didn't see much of her parents - not that she understood much of what was going on. Agnes, Cornelia and Michael took care of her. Sometimes the ghost of Victor Goth would pick her up out of her crib and play with her. Cassandra didn't notice that Cornelia passed away, because she was too young to understand.
Toddler
Cassandra saw more of her father and mother. Mortimer was always reading to her, which she liked. Both of her mother and father taught her many things. She enjoyed playing with Michael. But saw nothing of Agnes. One day, Mortimer brought the ghost of Gunther into her nursery, and tried to explain that this was her grandfather, Gunther. Cassandra did not mention that Gunther was one of the many ghosts that visited her room to play with her. Bella carried her around the house sometimes, to show her the other rooms in the old manor, and talked to her. Cassandra was just happy to have more people to talk to.
Her mother Bella started to gain weight. Cassandra didn't understand why. Bella carried her out of the nursery, to sit in the rocking chair in the parlour. There Bella told Cassandra that soon the stork would come to visit them and bring with it a new baby brother to play with.
Child
Cassandra got a huge surprise at her birthday party. Bella was in a lot of pain. Her father rushed Bella off to the hospital. Michael watched over the party. When her parents returned, they had a baby boy named Alexander with them. He was introduced to her as her new younger brother.
Right away, Cassandra knew she wanted to follow in her father's footsteps. She even told him that she wants to be a doctor just like him, when she is grown up. Sometimes she plays chess with her father, when he plays during his free time. Once she tried reading one of his work medical journals but didn't understand a word of it.
Even Cassandra was not blind to her uncle's longing to be with the ghost Lolita Goth. She tried to cheer him up by saving him some hotdogs for when he came home from work, but it did not work.