The ghost of Old Lady Myrtle manifested Dinah as she wandered around the Arbutus Place Rest Home in search of her son. When Egon Spengler stated her son was not around, Myrtle became highly agitated. Dinah shifted from a standard feline form into a durable lion form. Egon and Winston Zeddemore struggled to keep Dinah confined in Proton Streams. Once Myrtle was trapped, Dinah dissipated.
Empowered by ambient P.K.E., Dinah is able to fight against the power of two Proton Streams.
Dinah is a spectral construct.