translates to "Traitor" in English. Depending on what you're looking for, this topic appears most frequently in music, psychological discussions, and literature.
The "traitor" is a classic archetype in storytelling. Common tropes include:
Someone forced into betrayal due to blackmail or a "lesser of two evils" scenario. Песня предателя
In a broader sense, "predatel" refers to someone who violates a contract (formal or informal), a trust, or a duty. Discussions on this topic often cover: