Sergey seregga Zharkoy is a Russian YouTuber and streamer specializing in Dota 2. He was born on December 9, 1995, in Russia.

Sergey started playing Dota 2 during his first year at university. His first favorite hero was Dragon Knight, but later he began maining Phoenix, which remains his signature hero to this day. His preferred role is full support, and the highest rating he has achieved is 5560 MMR.

At the beginning of his journey, seregga was engaged in account boosting. Additionally, he attempted to pass the open qualifiers for one of the early tournaments of The International series and participated in amateur competitions.

Sergey started his YouTube career in 2019, following the start of the pandemic and global "lockdown," but he still had side jobs. "Psychological Portrait of a Recruit" was the first segment on his channel that brought him initial popularity. After that, he completely quit his job and fully dedicated himself to content creation.

By 2024, his YouTube channel had over 300,000 subscribers. That same year, he was invited for the first time to BB Streamers Battle 8, where he represented Team Stariy Bog. The team only managed to secure 6th place. A few months later, seregga once again participated in a streamer tournament. In 2025, at BB Streamers Battle 9, Sergey played with YBICANOOBOV, PETUSHARA, nesfeer, and Earthq as part of FEDERALNAYA, finishing in 2nd place.