Oleg kaori Medvedok is a Ukrainian professional Dota 2 player known for his signature heroes Shadow Shaman, Io and Phoenix.

Kaori started his career in 2019 with Team Try2Win, where he finished second at Epulze Monthly Cup Europe in September 2019. In 2020, he played on teams KBU and Yellow Submarine, but did not achieve significant results.

In June 2021, the cybersports organization Cascade Esports announced the addition of Oleg kaori Medvedk to its Dota 2 roster for the fifth position. The roster was active in local tournaments, but soon disintegrated. Oleg then moved on to several teams and mixes including plan-B esports, Miaww^^, Burning Fire, and in November 2021 joined Team Empire, where he played for four months.

In 2022, Rune Eaters Esports revamped their roster, welcoming kaori into the Support position. The team immediately participated in the regional DPC league and finished second in the standings. Polish club Project Armor then purchased the entire roster of Rune Eaters Esports, but kaori soon left the team to join Ooredoo Thunders. In Ooredoo Thunders, Oleg won European Pro League Season 4  and became a member of DPC WEU 2023 Tour 1: Division II. Other achievements of kaori in Ooredoo Thunders include first place at the European Pro League Season 8, fourth place at The Bali Major 2023. In addition, the team took first place at the qualifiers for the Riyadh Masters 2023, and at the tournament the team took 7th-8th place.

Oleg also participated in The International 2023 with Ooredoo Thunders, then renamed PSG Quest. Though not very successfully: the team finished 17-20, having dropped out after the group stage.

In addition, PSG Quest under Oleg's leadership tried to qualify for ESL One Kuala Lumpur 2023. The club successfully passed the open qualification, but took second place at the closed qualifiers and failed to qualify for the tournament.

After several second places in the qualifiers for BetBoom Dacha Dubai 2024, DreamLeague Season 22 and ESL One: Birmingham 2024 kaori left PSG Quest and moved to Level Up, but even with this team, he could not qualify for a major event, after which he joined the stack D_M_S to participate in the qualifiers for The International 2024. In the open qualifiers, the roster managed to advance to the closed stage, but there they took 10th place after being eliminated in the first round of the lower bracket. In July, Kaori left D_M_S.

In September, kaori joined Aurora Gaming. In the new team, the player debuted at the qualification for DreamLeague Season 24, but failed to qualify for the championship. Later, Aurora received an invitation to BetBoom Dacha Belgrade 2024, where he placed 6th.

• November 1, 2024 - kaori left Aurora Gaming.

As a member of PuckChamp kaori qualified for ESL One Bangkok 2024, after which the roster was signed by Natus Vincere and became the main roster of the club. At the tournament, the team failed to advance beyond the group stage. In March, the team participated in PGL Wallachia Season 3, but they also failed to reach the Playoff stage.

On April 11 of the same year, as part of Natus Vincere, they confidently defeated Rabotyagi in the grand final of CCT Dota 2 Series 8, winning 3:0 and becoming the tournament champions.

In June 2025, it became known that starting from July 1, Natus Vincere’s main roster will be disbanded and kaori was put on the transfer list.

On June 28, 2025, Natus Vincere participated in PGL Wallachia Season 5. The team lost in the lower bracket quarterfinals and finished the tournament in 5th–6th place.

On October 29, the player as part of Team Tea became the champion of European Pro League Season 31. In November, kaori joined MOUZ for PGL Wallachia Season 6 as a stand-in, and the team emerged victorious.

On January 8, 2026, he officially became part of Aurora Gaming.

At the first tournament of 2026, FISSURE Universe: Episode 8, Aurora Gaming became champions after defeating Team Spirit in the grand final. At the next tournament, DreamLeague Division 2 Season 3, the team also managed to become champions.

At the following ESL One Birmingham 2026, the team finished in 5th-6th place after reaching the playoffs. Later, at PGL Wallachia Season 8, the roster advanced to the grand final but lost to BetBoom Team and finished in second place.