From Porto Velho, Rondônia, his father Moisés Moreira recalls Mycael initially played as a left-back when he first trained with local neighbourhood side Seu Zeca.

[4] Initially a third-choice behind Bento and Léo Linck, Mycael became a backup option after Bento left in 2024, and made his professional – and Série A – debut on 4 July of that year, coming on as a late substitute for Lucas Esquivel in a 2–1 home loss to São Paulo, after Linck was sent off.

[11] His displays led him to being one of the players singled out from the tournament by South American football pundit Tim Vickery among those who “enhanced their reputations in Colombia [with] careers worth watching”.

[12] On 3 March 2023, Mycael was called up to the senior Brazil squad for the first time as interim coach Ramon Menezes prepared a team to play a friendly match against Morocco.

There, he lived for two years with teammate and fellow goalkeeper Bernardo Pisetta and his family prior to his move to Athletico Paranaense aged 14.