As soon Emily's voice died down, Erik responded, "Thank you, little shadow."
Then he grabbed Alice's hand and stepped into his dimension, to the great shock of the people around him. In their eyes, he simply disappeared into thing air.
Technically, there was a portal into that dimension hanging in the air now, but only someone with the spatial affinity or overwhelming power would be able to sense and possibly break into it.
Once inside, Erik released Alice's hand, and smiled at her. "Go organize what we took from your childhood home, alright? I need to go to talk to Astrid for a moment."
"Alright, Teacher. Have fun!" she grinned, knowing Erik would enjoy the situation with the Dominion.
Erik chuckled, and shoved her onward, before turning to find Astrid.
Without much surprise, he found her in the training room, where she was practicing her sword fighting against a dummy intended for that purpose.