Jaar reunites with FKA twigs, whom he recently worked with extensively on her second album, MAGDALENE.

As for Estado Unido, BrooklynVegan theorized that they are Jaar himself:

Who is Estado Unido? We’re not totally sure but it may just be an alias Nico is using. Last year he did a soundtrack for a film called EMA, and the name — though stylized with a dollar sign — appeared there too (“REAL – E$tado Unido feat. Stéphanie Janaina (Ema Soundtrack).” Like FKA Twigs, Stéphanie Janaina is also a dancer and somebody Jaar has collaborated with in other ways.