Dennis "Seregor" Droomers (born 27 October 1980) is a Dutch vocalist, guitarist, artist, and songwriter.

He is best known as the lead vocalist and guitarist for Dutch symphonic black metal band, Carach Angren.

Carach Angren began as his and Wijers' side project while they were playing in Vaultage, because the two connected over a shared love of horror and storytelling.

[5][6] It is also known that he was primarily raised by his grandparents[1] and is close to his grandmother who appears on the album art of This Is No Fairytale as the hand of the witch.

"[1] His masks are frequently sold to fans through his website and Facebook page and Italian band Fleshgod Apocalypse has also used costume pieces made by Droomers.