Yes even sweet little Cream wasn't safe from becoming a ghost :c

Shes' actually quite different from all the ghosts. She's not at all hostile or consumed by her emotions due to her death to the point of becoming a ghost like the others are, and she can't even remember entirely how she died. She only feels lost, scared and confused with her current predicament. She actually is more scared than people are of her.

Signs of her being present and frequent sightings of her include:

Reports and sightings of an unoccupied little rabbit girl being seen all throughout the property but is especially found outside, mainly in the gardens at random moments, and whenever someone approaches her, she runs away and isn’t able to be found

People claiming to hear the sound of the soft singing of a little girl or a little girl sobbing, yet they can never find the source

Claims of hearing the sounds of little feet running through hallways, but no child can ever be found

The elevators having a history of malfunctioning or even running off on the own, like them opening, closing and stopping at random floors (she attempted to use an elevator while trying to run away, but it malfunctioned, so she had to keep running away-)

Stories of people finding items they had lost being placed outside their doors, or in the middle of their beds or tables in their rooms sometime later. (She's a nice little ghostie)