Woo, talk about a good start. I accidentally started with a later chapter, but this writing piece wraps up every question I had.
The Sharpe brothers are set up as formidable antagonists, though I like that they aren't cartoonishly villainous; they still hold affection for one another, they still feel like real people just conducting business, as nasty as that business might be. That being said, I appreciate the way you wrote Chase this chapter, where the nervousness is at a high and we get direct confirmation that Elias unsettles them. Between Elias assaulting them and misgendering them, it was a well-written balance of uncomfortable and intimidating.
Great stuff!