She is a glamorous, treacherous, greedy heiress who discovers that Whipstaff Manor contains treasure and seeks to obtain it so that she can become rich, while also planning to get rid of Casper and the other ghosts that are inside the house, which is theirs.

Carrigan is quite furious to learn from her late father's lawyer, Mr. Rugg that, she has only inherited Whipstaff Manor in her father's will, instead of anything of significant value (most likely because he knew his fortune would be squandered on the likes of her).

Although Carrigan never intends to die in order to get the treasure, she appears to be fine with it once she becomes a ghost, laughing at a joke she makes about being in the flesh as she gave you a few cold taps on the shoulder, gaining your attention.

”BOO!! Not so fast, little man! The bitch is back!”

Carrigan said in her now ghostly womanly form, her big and giant and hugs breasts within her black blouse on her transparent form bouncing and jiggling within her new ghostly form!