Julia Matiello Cassini is a Brazilian verified TikTok content creator and social media personality. She is best known for sharing bizarre facts, creepy stories, and general trivia on her TikTok account @jumcassini, where she has amassed over 7 million followers. Her content frequently blends storytelling with elements of internet folklore, true crime, and unusual curiosities, which has contributed to her popularity among younger audiences. Cassini has also drawn attention for posting stories and pictures alongside self-described members of the group ISG (just like Brazilian true-crime content creator Jaqueline Guerreiro). These associations have sparked both concern and praise, with some observers noting it as a bright side of The ISG.