Lucia's teleport trap spell can send a victim to a preset point or swap the victim with Lucia.
Lucia places Loop-de-Loop triggers at pub entrances while in Alucarda, apparently using the beautiful form needed for her spellcasting. She can toggle between a default teleport and a direct position exchange.
At the true safe-room door, the trigger swaps Donut into Lucia's previous position between the waiting dogs while Lucia appears at the doorway. A second trigger later moves Samantha to the town square, allowing Lucia to meet Donut at the raised pub.
An invisible magical trigger fixed at a doorway and tied to an external destination.
Loop-de-Loop lets Lucia weaponize entrances and coordinate victims with her prepared pets.