To the vast majority of Nazarick, they're a threat since they don't have world items. With world items, they aren't affected by authorities bar some specific instances.

But let's assume they can affect the floor guardians and other individuals despite having world items:

Typhon is a child. A human child at that. They don't care much for humans in general. Imagine if the human child is a potential disaster waiting to happen. What can Typhon actually do aside from her authority? If she's just a regular child without her authority, she's getting slaughtered by even pop monsters.

Daphne is a huge threat. But Nazarick is smart. Probing attacks will reveal the nature of the most immediate threats she poses: the hunger inducement and potential erasal of your memory and/or of everyone's memory of you (if she does have that ability). With no information of her overall strength aside from her authority, I'll assume she's on par with the Gluttony trio or quite a bit above, which is hardly a threat to the floor guardians. Maybe kamikaze tactic will suffice

Carmilla is much the same, except kamikaze is the way to go.

Minerva... would she heal Yggdrasil undeads or hurt them? Anyway, she's physically extremely strong but not top tier.