Retired Colonel Marcos Serra, a 67-year-old former officer in the Brazilian Army, has made a significant mark on the comment section of Folha, a prominent Brazilian newspaper, where he has posted over 17,000 comments. Serra believes that this platform allows him to voice his conservative opinions and advocate for traditional values. He encourages supporters of right-wing ideologies to participate in public discussions as a means of fostering societal change. Despite his frequent disagreements with the outlet's left-leaning editorial perspective, he remains a loyal subscriber since 2010 and reads it daily, utilizing the platform to speak out on political matters.

Serra's military career began at the young age of 17, culminating in three decades of service within the cavalry. His dedication to equestrian activities continues even after retirement; he still participates in riding competitions at 48. Originating from Rio de Janeiro, he found himself relocated to Porto Alegre in 1987. He humorously recounts the contest among local women for his affections, which led to his separation from his first wife, stating, "I ended up separating from the carioca as there were many gaúchas interested in me." This personal background adds a layer of relatability to his engagements in the public discourse about political ideologies and societal values.

By emphasizing the importance of debate, Serra portrays his contributions to the comment section not merely as an expression of his individual views, but as a collective rallying point for like-minded individuals. He argues that engaging in these discussions is crucial for bringing about the change he desires in Brazilian society. His advocacy for more pronounced right-wing representation in public forums underlines a growing division in Brazilian politics, particularly in the backdrop of an increasingly polarized social climate. Serra’s experiences and opinions can be seen as a reflection of a broader trend among conservative voices seeking to assert their presence within mainstream media platforms that they perceive to be biased against their values.