|“||We use explosives to shake the earth, helping us to map the surface of the island.||„|
— Houston to James Conrad
San Lin (Wife)
Monarch seismologist (retired)
During Kong: Skull Island, he seems to behave in a typical, reckless and aggressive manner, having no problems using bombs to map out Skull Island, and pointing a shotgun at a group of Iwi natives when surrounded.
Years later, after joining Monarch and becoming a father, Brooks' personality has (as stated by his son in a flashback in Skull Island: The Birth of Kong) become similar to that of his monarch co-worker, Dr. Serizawa, primarily in his adamant insistance that "nature strikes its own balance".
Houston, alongside William Randa were able to coerce and convince James Conrad to join their expedition to Skull Island. Houston also informed James about their plan to use explosives to map the surface of the island. In a post-credits scene, Brooks, along with Conrad, San Lin and Mason Weaver are recruited into Monarch.
In-between Kong: Skull Island and Skull Island: The Birth of Kong
During his time with Monarch, Brooks would go on to marry Lin, and father one son, Aaron; sometime around the year 1995, Aaron joined Monarch, but soon came to a heated disagreement with his father over the latter's decision to leave Skull Island under Kong's supervision.
Years later (during the year 2012, to be exact), Brooks was preparing to retire, and received a "retirement present" of sorts: a military grade recorder that was in the possession of his son during a supposed mission to Antarctica. Upon correctly guessing the password to the recorder (which was "Gjallarhorn", due to the fact that he would constantly read Norse mythology to Aaron during his childhood, and thus it became a shared password between the father and son) Brooks learned, much to his dismay, that his son did not go to Antarctica; instead, he defied his father and mounted an off-the-books mission to Skull Island, which resulted in the loss of the entire crew (sans Aaron) but did shed more light on Kong, himself, and how Skull Island has evolved since Houston last "visited" it.