Firefly form infiltration

Soucouyant

transforming into a ball of fire that streaks across the dark sky. In this fiery form, she can slip through the tiniest cracks and crevices of homes

Adze

In its firefly form, the Adze is said to be able to slip through the smallest gaps, cracks in walls, or keyholes to enter a home undetected, where it feeds on the blood of sleeping victims, with children said to be particularly vulnerable targets in many tellings.