Rosie is a slender demon with pale white skin, sharp white teeth and a really long neck. She sports short hair though it could be tied up under the hat and, similar to Alastor, she is always smiling. She wears a red dress with gray shoulder pads, a black belt, and black wrists. Her red sun hat has two skulls and three black flowers on the front side with a large red and black plume on the top side.
- Vivziepop says Rosie and Alastor's relationship is similar to Mary and Jack's relationship from Mary Poppins Returns.
- Vivzie's headcanon voice actor for her would be Barbara Streisand from Hello, Dolly!.
- Faustisse confirmed that there will be a duet with Rosie and Alastor in one of the future episodes of Hazbin Hotel.
- Rosie, in terms of power, is a 2 or 3 on a scale of 1 to 10 according to Fautisse. 
- According to Fautisse, Rosie never died, so her origins are unclear. 
- ↑ https://twitter.com/VivziePop/status/1080414803435302912
- ↑ 💖 HAZBIN HOTEL FASHION STREAM for the COMICS!! 💖
- ↑ 💖 Inking the Alastor Comic💖
|Main characters||Hazbin Hotel||Angel Dust • Alastor • Charlie • Husk • Niffty • Vaggie|
|Helluva Boss||Blitzo • Millie • Moxxie • Loona • Stolas|
|Overlords||Alastor • Lilith • Lucifer • Rosie • Valentino • Velvet • Vox|
|Supporting characters||Baxter • Cherri Bomb • Crymini • Egg Bois • Exterminators • Helsa • Katie Killjoy • Mimzy • Razzle and Dazzle • Seviathan von Eldritch • Sir Pentious • Tom Trench • Travis|
|Others||Arackniss • Barbie Wire • Collin • Eddie • Fat Nuggets • Henroin • Loo-Loo Land Mascot • Molly • Octavia • Roo • Robo Fizz • Tilla • Villa|