Miss Gladstone is a teacher aboard the Enterprise-D who cares for the ship's youngest children and looks after Deanna Troi's rapidly growing son Ian.
Miss Gladstone appears in The Child, the opening episode of the second season. She works with the small children among the civilian families living on the Enterprise-D.
When Ian Andrew Troi, conceived by an alien life force and ageing years in a matter of days, is old enough to join the other children, Troi leaves him in her care. Gladstone treats him as she would any boy of his apparent age and shows the group a litter of puppies, which delights him.
She is one of the first glimpses of everyday family life aboard the ship. Ian soon gives up his human form when he realises that his presence is endangering a cargo of plague samples, and so the ship.