Of the things Decima was expecting to happen today, one of her victims having a daemon whose power was hiding his, even from her sight - 

Well, it's one of the things you need to watch out for.

She had not expected that hidden power to involve teleporting others. Usually teleporters have to move themselves, too, and 'teleport other people' and 'hide' is not particularly thematic taken together. She'll have to figure out how that slots into her conceptual theory of powers...

The swirling not appears to have hit her and Tyrannissa, none of their other allies, depositing them...

Somewhere.