ruminator (noun)

1. The ruminator eagerly watched the thought-provoking film, contemplating its deeper meaning.

2. As a history buff, the ruminator often reflects on the causes and consequences of major historical incidents like the assassination of Martin Luther King Jr.

3. The ruminator immersed themselves in a complex anime series, introspecting on the profound themes it explored.

4. The ruminator frequently delves into science fiction novels, pondering the ethical implications of advanced technology in future societies.