In writing Spunkmeyer's character for my fanfiction, the main issue I've been coming across is picturing his voice. There are multiple points throughout the movie where it seems like his voice changes, accent-wise. I did listen to Hicks and RidgeTop's interview with Daniel Kash, but it's still confusing as to why he goes from no discernable accent (breakfast scene) to slight New York accent (dropship landing) to English (assisting Bishop) to strong New York (his and Ferro's deaths).
The site TVTropes lists Spunkmeyer as having a "broad 'Noo Yawk' accent."
Is it something that can be left up to fan interpretation, or is this something I'm completely overthinking?