Carroll started making comics in 2010, and their horror webcomic His Face All Red went viral around Halloween of 2010.

[3] Their 2016 webcomic Some Other Animal's Meat was adapted as "The Outside" for the Netflix horror anthology Guillermo del Toro's Cabinet of Curiosities (2022).

"[5] In 2014, Carroll published Through the Woods, an anthology book of four original stories and an adaptation of His Face All Red for print format.

[2] The magazine Room said of their work, "Beautiful, yet delicately sinister, fairy-tale comics evoke a feeling of isolation that twists into suspense as the reader clicks and scrolls through a horror story and that lingers in the mind long after the final panel."

[17] The critic Joe McCulloch said of Carroll's His Face All Red, “Even in the late ’80s, guys like Stephen Bissette were developing forums like Taboo which were specifically designed to counteract the traditionalism of comics horror … ‘His Face All Red’ seemed a break from that when it hit me.

And it hit a lot of people.” Carroll's 2019 book, When I Arrived at the Castle, received positive reviews.

"[13] A review for Women Write About Comics called it a "dark, delicious fantasy" and said, "It’s the kind of story that needs multiple readings, not because it’s confusing, but because there's so much to unravel, so much thematic detail to sift through.

"[18] PopMatters rated it 8 out of 10, and said that "Carroll's style remains familiar: deceptively cartoonish figures that evoke a children's picture book despite the puddles of blood oozing into the gutters.

Carroll prefers ever-changing layouts that only rarely provide traditional panels or grids.