After Sera left, Vicky became really sad. Her words caused the strange reaction, and so she blamed herself for distressing her mother.
Luckily, Bran was there to calm and comfort her. He told her it wasn't her fault, and that her words brought back Sera's trauma. He spoke kindly and with as much warmth as he could muster. It took nearly an hour to convince Vicky that she wasn't the one to blame.
Henry stayed near Vicky all this time, listening to their words silently. He continued holding Vicky's hand, which Bran didn't like, but since it made Vicky feel better, he didn't feel right about stopping it.
Following sunset, they headed back to the castle. Vicky stared at the glowing buildings stretching far into the sky around her. She had never seen anything like this.