Phantasma is a phantom/ghost of about 10 or 11 years old from Scooby-Doo and the Ghoul School and is blue with big eyes. She has white short hair with a blue streak, worn in a sideways ponytail. She wears a simple light blue dress with high heeled white cowboy boots.
Phantasma is loud, talented, and clever for her age. She is good at swimming. She is the most loud, hyperactive, playful of the girls, and has a very high-pitched laugh that she uses usually before speaking and to express her feelings. She is also silly and wacky, but is actually smarter than she appears. She also loves to play, float, and run around.
Since she is a ghost, she is transparent and can float through many objects. She can also spin her head around like an owl.
Her gift to her father was a composition which she wrote and played with Miss Grimwood's hand keyboard with her octopus butler on drums. It was called 'Duet for Three Hands and Six Tentacles'.