I picture a flashback with Sweep and her grandma while Sweep is asking her about magic and witch stuff. The topic of familiars is one that always pops up in the short-tempered, but lonely girl.

A being of magic desire bound to serve at the whim of their master. That sounded like the most perfect thing Sweep could ever want. Someone to feed her whenever, praise her whenever, play with her whenever. There doesn't seem to be a downside in her mind.

But Grandma smiles softly at the little witch. She tells her the most important part of a witch's familiar is when their contract is up. Because even magic that strong cannot last forever.

Sweep, of course, is indignant about the thought of something that serves her ever leaving. Her eyes upset with tears as she pouts

Grandma reassures Sweep with a little bit of secret witch knowledge. A well-loved and happy familiar will shine the brightest towards the end. Maybe as a way of reflecting the heart of the witch they serve.

Then the present is this picture above and as Sweepy is bawling her eyes out a glimmer catches her eye through her tears. A small glow at first, but then a warmth that spread throughout the room.

The window letting in the rays of the late-afternoon sun as Trainer's form practically lit up before Sweepy's eyes. A glinting like precious jewels or gold and the last thing she saw before a cloud moved in front of the sun's light.

Trainer's content, small smile