You mentally run through your options. You briefly consider making weapons or other tools for the sake of self defense, but you don't want to escalate the situation if you don't have to. After giving the kitties a quick heads up, you start building your defenses.
CREATE: Metal door with locking mechanism, camera view monitoring just outside the door
CREATE: Metal door with locking mechanism, camera view monitoring just outside the door
Alto creeps over to check the viewing screen, gripping Tenor's paw tightly.
You can't see anything that could be the source of the noise. The sound is pretty echo-y so maybe it's coming from further away...?
At your request, Tenor moves over to the nearest console and starts flipping through surveillance feeds. Alto stays by the door, stating that if anyone wants to come in and hurt her new friends, they'll have to get through her first.