Now i know what assists you means. one of three Architects "ARCHITECTS"

Doesn't that mean that

Guiding Light - Creator of The Hotel

Curious Light - Creator of The Rooms

Monster Light - Creator of monsters

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Monster light is in two places

-The rooms

-The Hotel

Pomaga Ci - Assists You

Doesn't that mean if we use crucifix on able to banish entities Guiding Light/Curious Light is helping the monsters to get out the demon soul if it is correct then it would mean monsters are poor souls and Monster Light can control them

Seek and Figure are maybe not created by Monster light mostly but yea they can't be banished because there's NO SOUL which points out to seek is made out of ink and figure of Festering Meat and skeleton body and they are controlled by Monster Light

Entity: Why they can't be banished?: (theory)

Timothy: It isn't an monster + it may be also In real life Hotel if opening drawers.

Glitch:. This entity is maybe from other dimension as it's in The rooms and The Hotel, maybe he is powerful?