The pattern identifies tokens that introduce or establish a character's role, persona, or identity at the beginning of roleplay scenarios, particularly in user prompts requesting the AI to adopt a specific character. This includes articles, pronouns, and linking words that directly precede or connect to character descriptions (e.g., "a man who," "you are," "the," possessive pronouns). The pattern also captures tokens that signal transitions into character roleplay mode, such as stage directions in parentheses, opening narrative actions, and initial character establishment phrases. Additionally, it marks tokens that emphasize character traits or personality aspects being defined, especially adjectives and descriptors that shape the persona being adopted.
