the.com/infiltrator
Someone who belongs precisely as much as they pretend to.
means A person who secretly enters a group or place to spy, sabotage, or gather information from inside.
from From Latin filtrum, a felt strainer — the idea of seeping through, drop by drop. To infiltrate was literally to trickle in unnoticed, like water through cloth, before it described spies through borders.
Geology firstWater infiltrated soil long before agents infiltrated cells.
Best traitForgettability beats charisma for staying undetected.
Mole vs infiltratorA mole is recruited inside; infiltrators arrive pre-loaded.