Posea Reef appears in "Great Scarrier Reef". She tells the Lagoona 'either sink or swim', and helps Lagoona, along with the other ghouls. She appears to be a skilled gardener, appearing to be skilled at botany/gardening.
She also likes to listen to Catty Noir music.
Posea tells Lagoona she has to face her fear to escape the Scarrier Reef and go home. She then is seen listening to Catty Noir music on her headphones while gardening. [Source]