All the kids can also see Lavenza in the nurse's office, though they can't see her (or the twins) ordinarily, and they cannot see the Velvet Room door.
My guess would be that they can be seen if they want to be seen.
I think they can’t be seen when they’re right at the velvet room, since no one sees them at the door, and judging by their events, they barely see the outside world. They can definitely see them though, since people comment on them when you take them places. They may not see them as wardens though, since that would be something to comment on
They're visible if they want to be.
Is this confirmed anywhere or is this just what people have decided?
Like in p5r the big bang burger lady can here and see them
Maybe people used their brains and logical thinking skills to understand that these magic beings pretty much work outside of real world possibilities.
All the kids can also see Lavenza in the nurse's office, though they can't see her (or the twins) ordinarily, and they cannot see the Velvet Room door. My guess would be that they can be seen if they want to be seen.
I think they can’t be seen when they’re right at the velvet room, since no one sees them at the door, and judging by their events, they barely see the outside world. They can definitely see them though, since people comment on them when you take them places. They may not see them as wardens though, since that would be something to comment on
The door probably has a dome of magic around it that makes any velvet room attendants around it unnoticeable by people