María Isabel Medina Peralta

María Isabel Medina Peralta (born 2002) is a Spanish far-right activist associated with neo-Nazism, She came to public attention at age 18 in February 2021 after making a speech against Jews at an event in honour of the Blue Division. Peralta said that she first identified with the extreme right at age 13. An investigation was opened into her actions but was closed by a judge. In the same interview, she condemned Spain's main far-right party Vox for not being extreme enough, saying "they disgust me more than [far-left] Podemos". Peralta argued in court that she was not the leader of the neo-Nazi group and that she believed the event to be legitimate as it had allegedly been organised by social media personality and later Member of the European Parliament Alvise Pérez. Bastión Frontal, which had around fifty members, chose to dissolve in September 2022 due to financial issues and criminal investigations concerning Peralta and co-leader Rodrigo Miguélez. Peralta's sentence was upheld on appeal by the in July 2026.

In September 2021, the Simon Wiesenthal Center reported that Peralta moved to Germany on a scholarship with far-right party the Third Way in Düsseldorf. The following March, after arriving at Frankfurt Airport with a Nazi flag and a copy of Mein Kampf, she was detained and deported. In January 2023, Germany banned Peralta for life from entering the country, citing security reasons. Spanish television channel LaSexta featured an interview with Peralta for a documentary on far-right extremism in November 2021. The broadcast was condemned by Israel's embassy in Spain. In 2023, Peralta was questioned by police under anti-terror legislation before being allowed into the United Kingdom, to speak at an event by British nationalist journal Heritage and Destiny, edited by Mark Cotterill.

Peralta joined Núcleo Nacional in 2025. In August 2026, she spoke in front of the Moroccan embassy in Madrid during a protest denouncing Moroccan immigration and Spanish political corruption relaying to the 2026 Morocco–Spain border incident.