[3] Arrimadas studied at the Catholic school Nuestra Señora del Pilar in Jerez de la Frontera.

[4] When she moved to Barcelona, the company she worked for, Daleph, paid her formal Catalan language classes to obtain the C1 level.

[3] She became the spokeswoman of Citizens in Catalonia in 2015, substituting Jordi Cañas, who resigned due to being indicted for alleged tax fraud.

[3] In September 2017, Arrimadas reported to police a Catalan female who threatened her with gang rape for opposing independence; the woman received a four-month suspended jail sentence.

[9][10] During the campaign for the elections of Catalonia in 2017, a hoax was popularized alleging Arrimadas' father was a Francoist secret agent.

[13] In response to the snap election, Arrimadas announced she would run for a seat in the Cortes Generales with senator Lorena Roldán as party spokesperson in the Catalan Parliament and Carlos Carrizosa as leader.

In the November 2019 election, the party's vote share fell to 6.0% and 2 seats, but Arrimadas nevertheless managed to retain hers and remained a member of the Chamber of Deputies.

[1] On 30 July 2016, Arrimadas married Xavier Cima, a former Catalan MP and municipal councillor in Ripoll for the pro-independence Democratic Convergence of Catalonia,[15] at an estate in Jerez de la Frontera.