Kaelie like all Seelie's use a type of trickery magic such as casting illusions and glamouring their appearance.She was able to use healing magic because of her association with Alexander.
Alexander taught her from The Book of the White,which is a spellbook, one of the most powerful and famous volumes on supernatural work in the world, along with the Gray Book. It is an ancient tome of extreme power known to the beings of the Shadow World and is considered an article of dark magic.
This made her stronger than most Seelies.
Kaelie smiled and hugged her boyfriend,while Alexander walked up to Derek and comforted young Derek and Laura"I am sorry for your loss, and I'm sorry about not reaching there faster."
[A/N:I know some people didn't get the memo about Alexander not being a god or he is not omnipotent.Also, his knowledge about Teen Wolf is really limited and he didn't know anything about the Hale fire,like he came to help by then Talia was killed.]
Derek was trying to be strong for her sister, while Laura wiped away some of her stray tears and asked"Did anyone else survive?"
Alexander sighed and replied"Yes, your Uncle Peter survived. But with a lot of burn injuries and he is in a coma. I was able to set up a place for the human side of your family in San Francisco, but among your mother's pack only one survived."
Alexander had a lot of people in the police, who gave him a detailed report. Also, he did some investigation of his own and handed the report over to the siblings added"We have not found the bodies of Cora among them, so I believe she is hiding somewhere. After all she is trained to do in such a situation is "hide and heal."
Derek and Laura sighed in relief hearing about their younger sister. They were not sure where she could be right now, since there is a possibility of her going to one of their branch's families or even joining another pack.
As Alexander gestured to his girlfriend Kaelie and said"This my girlfriend and she will help you with anything you want. Also, you can talk to her since she is good with mind healing. "
Derek and Laura knew about the Shadow Hunters from their mother, although their knowledge was limited on this.
Kaelie started her therapy sessions and Laura was opening up,her mind-healing sessions were successful.But Derek was harder to deal with as Kaelie noticed something was eating him up from the inside,like he was feeling massive guilt and anger.
Kaelie questioned, "What is making you feel so much guilty Derek,every time the subject of Hale fire is brought up there is huge amount of guilt and hate coming from you."
Derek wanted to walk away,but Laura held his hand and said"They are trying to help you, let everything out.This will help you a lot."
Derek clenched his fist and after looking thoughtful answered"I know who started the fire."
Alexander already had a guess after all he did a lot of digging and talked with Chris about the fire.While Laura's eyes widened with surprise as Derek gritted his teeth continued"It is the Argents or specifically Kate, I loved her and was in a secret relationship with her."
Derek stopped and took a deep breath to control his anger and continued"I think she used me to get information about our family."
Alexander shook his head and replied"No, Kate wasn't the assailant. But it was an Argent."
Laura and Derek looked at Alexander slightly confused, Alexander explained"I investigated the whole issue and even talked with Chris, it seems Kate really started falling for you and even talked with the family about your relationship, it was a way to patch things up between Hales and Argents. She is actually out of there looking for you now."