Gained fame running the YouTube channel Couple Reacts, uploading daily K-Pop reaction videos with her boyfriend Ali Harmsworth. They earned over 190,000 subscribers and more than 85 million overall views to their channel. She also started her own channel called Gena Casey which has beauty, lifestyle and reaction content.
She studied film and media in college. Their first video was uploaded on May 21, 2017, and was titled "BF & GF React to K POP for the first time (BTS - Not Today)."
On May 18, 2018, she and Ali posted the video "BTS 'FAKE LOVE' Official MV - BTS Reaction (Couple Reacts)." Their most popular video, it earned over 600,000 views. She has a massive scar on her chin from being hit in the face by a scooter when she was young.
She is an only child of parents Tracy and Gary. She has triplet cousins named Shane, Liam and Ryan.