A mere glimpse, but it was enough.

Dark eyes staring at the spot the silver form had been, Katie was seemingly frozen where she stood, shocked. A pained look flashed before her face as the voice of a memory shouted "Katie Cub" in her head, disappearing as soon as it came.

Her wand lowered, grip loosening, Katie's eyes closed.

Of all the animals it could have taken the form of, her patronus was a bear cub.

Turning swiftly from the room, Katie kicked at an old rusty cauldron on the floor as murmured words escaped her lips: "You better grow."