Siren Head was created by Canadian horror artist Trevor Henderson as a towering, emaciated creature with sirens for a head, first shared in his online horror artwork in 2018. The character quickly spread through YouTube horror videos, indie games, TikTok edits and meme culture, where its siren sounds became shorthand for approaching danger. The 666 label used on this clip reflects its darker, more intense fan-made variation rather than a separate official character. It remains popular because the siren is instantly recognisable, easy to drop into short videos, and reliably unsettling without needing any dialogue.