Carla Herrero Torellas (born December 1994), also known by the pseudonym Silay Alkma, is a Spanish writer, lecturer, and activist against school bullying.

An accompanying video titled "El dolor silencioso" (The Silent Pain) featured bullied youth including herself encouraging others to speak up.

Her organization Rompe el Silencio (Break the Silence), formed in 2013, supported bullied youth in online and face-to-face settings.

[5] Herrero had suicidal thoughts and began to self-harm; she said she felt anguished, depressed, confused, victimized, and useless.

[12] In 2013, with backing from the Fundación Telefónica program Think Big Jóvenes, Herrero formed an organization called Rompe el Silencio (Break the Silence) to support youth who have suffered bullying, abuse, and psychological disorders.

[6][15] In 2015, Rompe el Silencio was among ten winners in Spain's Making More Health contest sponsored by the nonprofit network Ashoka and the pharmaceutical firm Boehringer Ingelheim, receiving €400 along with professional training in Barcelona.

[14] The next year, Herrero was one of two finalists from Spain to attend an international Making More Health conference at Boehringer Ingelheim's headquarters in Germany.

[16] According to the leadership consultancy WALK (a member of Oxford Leadership), where Herrero works as an office and program manager, she received a psychology degree from the National University of Distance Education, previously volunteered for the United Nations as a research data analyst, and worked with Youth Europa and the European Youth Parliament.