In season two Elise and Natasha would leave the set to another room during intense scenes to hug and tell each other their "I love you"s.
Every episode is shot from one angle, and in one continuous take. Except the Christmas special. The Christmas special featured multiple different camera angles, including cuts to different characters faces, and other action happening within the storyline. When the fans found out about the new camera angles, they went into an excited fit.
The fandom calls themselves the Creampuffs, so named after one of Carmilla's many nicknames for Laura
The entire first season was shot in two, two days blocks.
Although she plays the title character, Natasha Negovanlis doesn't apprear until the second episode of the show.