Kozi, whose real name is Jarosław Marchewka, is a 21-year-old top laner from Poland. Representing Rebels Gaming, he belongs to the young generation of Polish competitors looking to make their mark in the League of Legends scene. Even at a relatively early stage of his career, his commitment to one of the game’s most solitary and mentally taxing roles speaks to a certain competitive resilience.
Top lane is often described as an island, a lane where players are frequently left to fend for themselves with limited jungle attention and long, grinding duels against a single opponent. It demands patience, precise wave management, and the ability to survive isolation while still contributing to the larger map picture through teleport plays and split-pushing pressure. A top laner must read matchups carefully, knowing exactly when to trade blows and when to play defensively until a power spike arrives.
Kozi’s affinity for Fiora tells you a great deal about his competitive temperament. Fiora is the archetypal duelist, a champion built around outplaying opponents in one-on-one combat through precise parries, footwork, and the exploitation of vital weak points. Piloting her effectively requires supreme mechanical confidence and an appetite for the kind of skirmish-heavy, carry-oriented top lane that puts the outcome squarely on the individual’s shoulders. It is a pick that rewards aggression and punishes hesitation.
As a member of Rebels Gaming, Kozi carries the responsibility of translating that duelist mentality into team success. Young top laners with a taste for carry champions often become the focal points of their squads, and the challenge lies in balancing personal playmaking with the discipline of coordinated team fighting. Developing that maturity is a key milestone for any rising talent in the role.
At 21, Kozi has ample runway to grow into a more complete competitor. Continued repetition against strong opposition, alongside a willingness to broaden his champion pool beyond his beloved Fiora, could open doors to higher levels of competition. For supporters of the Polish scene, he represents an intriguing prospect whose confidence in the top lane suggests both ambition and the potential to develop into a genuine carry threat in the seasons to come.
Kozi (Jarosław Marchewka) is 21 years old, born April 6, 2005.
Kozi currently plays as Top for Rebels Gaming in the .
Kozi is best known for Fiora.

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