"What is an Archai? And will you untie me already?" Tanjiro demanded.

"An extinct race of incredibly powerful beings, often mistaken for Firestarters. After being hunted by both good and evil forces, the Archai were eliminated in the early 1100s because of their power to use the elements to burn holes in reality. Once the Archai could control the blaze within, they could naturally manipulate nature's fabric to travel to any and all planes of existence." Reiko read from a red book.

"You said extinct," Zenitsu said. "Then why is Tanjiro one?"

"I can't explain it. I just know that if he isn't protected, Tanjiro will be killed." Kuri said. "In fact my superiors would probably prefer it if I stripped his powers right now."

"You can't do that!" Zenitsu said. "He didn't do anything wrong!"

"Relax." Reiko said. "Kuri never really agreed with the Council. Besides that, believe it or not, this isn't the first time she's seen an Archai."

"That's right." Kuri said. "The other was just a child, half my age, but they were planning to train him to use his power for military purposes." She smiled fondly. "I think that's the first time I ever got in touch with my true power."

Kuri untied Tanjiro.

"I-I remember." Tanjiro sat on the edge of the bed. "I woke up in bed and there were holes in space all around me. Nezuko tried to help me and—"

"Where is Nezuko?" Zenitsu said suddenly.

Kuri hissed and grabbed at her head. Without warning, she levitated into the air, about two feet, back arcing. She grabbed her head and finally fell back on the bed, breathing hard.

"A vision?" Reiko said.

"It was sent to me by the captors. They have your sister. Th-They plan to break your circle by using your sister Nezuko's Blood Demon Art. They have her body bound, unable to move." Kuri looked pained, as though she could feel what Tanjiro's sister was experiencing.

"Who has them?" Inosuke asked.

Kuri shook her head. "I-I can't tell you that for sure. It's like they were leading me. All I could see was what they wanted me to see. I'm sure it's a trap."

"That doesn't matter." Zenitsu said. "We have to go."