Jinnytty

Yoo Yoon-jin (; born July 28, 1992), better known as Jinnytty , is a South Korean online streamer. Her streams typically consist of her traveling to different countries. She is known as the Penguin Sister to her Chinese audience.

Early life and education Yoo graduated from University High School in Irvine, California in 2010, then graduated from Yonsei University with a degree in Information and Interaction Design in South Korea.

Career Yoo started live streaming on Twitch at the end of June 2017. During this period, she liked to play Hearthstone, and she also watched professional player games or teaching videos.

After becoming popular, Yoo catered to the audience with high interactivity, pure style, and increased her Taiwanese content. She also traveled to Taiwan in March 2018 and held a fan meeting.

At the end of 2019, Yoo changed her target audience to European and American viewers and also traveled to the United States. During the beginning of COVID-19 pandemic, she stayed at the home of the American streamer EsfandTV for several months, and they streamed together from time to time.

From 2020 to 2022, Yoo traveled to and streamed live in South Korea, Europe and the United States.

In 2023, Yoo walked 1076 kilometers around the entire length of Taiwan in what has become her most popular streamed event known as Waddlethon, during which she gained over 90K followers and 6.5M hours watched. During her Waddlethon on April 24, 2023, Yoo encountered a veiled stalker that followed her around for about 4 hours. The police were contacted and the stalker was institutionalized.

In May 2025, Yoo was attacked during a street livestream in Toulouse, France, by a man who thought she was filming him and struck her camera while shouting insults.

Filmography Music video appearances Year Title Artist 2020 Tier 4 – "Bang Bang" Jinnytty, HAchubby, Yunicorn, Yuggie_TV 2021 Tier 4 – "Summer Fire" Jinnytty, HAchubby, Yunicorn, Yuggie_TV

Awards and nominations Award ceremony Year Category Nominee / Work Result The Streamer Awards 2021 Best IRL Streamer Jinnytty 2022 2023