Born in Fazenda Rio Grande, Paraná, Lucas Ronier joined Coritiba's youth setup in 2013, aged eight.
[1] On 19 December 2022, he signed a new contract with the club, being also promoted to the first team.
[2] Lucas Ronier made his professional – and Série A – debut on 3 December 2023, coming on as a late substitute for Robson in a 1–0 away loss against Red Bull Bragantino, as his side were already relegated.
[3] He scored his first senior goal the following 9 March, netting his team's second in a 2–0 Campeonato Paranaense home win over Cianorte.
[4] On 19 June 2024, after establishing himself as a starter for Coritiba, Lucas Ronier renewed his contract with the club until December 2027.