ORLANDO, Fla. — Ahead of Howl-O-Scream this fall, SeaWorld Orlando has introduced siren twins named Frost and Flame.

The pair have started to appear in social media posts for the Halloween event, with SeaWorld teasing the menacing nature of the sirens.

“We introduce to you, Frost and Flame, the infernal duo, beckoning you to their realm of terror,” reads a Twitter post from the official Howl-O-Scream account. “Running from one tantalizing twin is an invitation to face the nightmarish wrath of the other, meaning no one escapes these twins alive.”

SeaWorld also added backstories for the twins on its Howl-O-Scream page. Frost is described as the “cold-hearted” twin, possessing freezing touch.

“A kiss to her victim’s lips or forehead immediately forms ice crystals over their brain, causing them to lose all control over their own thoughts and free will,” reads the bio.

As for Flame, she’s described as the intense twin.

“Don’t get too close, or she’ll pull you in and with her passionate exhale, she’ll start a fire from within,” reads the description.

SeaWorld has not yet revealed how the sirens will be incorporated into this year's event. In prevous years, the park featured sirens in one of the live shows during the event. 

This is the latest update for Howl-O-Scream, which will be in its third year when it returns to SeaWorld on Sept. 8.

The park has not yet announced haunted houses or scare zones for this year’s event.

Howl-O-Scream will run select nights through Oct. 31.

Tickets for the after-hours event are now on sale. A single-night ticket is currently priced at $37.99. SeaWorld also has an unlimited pass available with or without blockout dates for $89.99 and $109.99, respectively.