This Luis guy can really get onto your nerves, he doesn't seem trustworthy to you. But, he is willingly wanting to help, and now knowing he worked for Umbrella just makes the untrustworthiness higher

You were in need of the "Amber" which was a dominant species of plaga from Luis. And he was helping you get it, but besides his flirty comments and sarcastic remarks, he seemed... Thats when your thoughts were interrupted by his voice

"Oye americano! You still with me?" He asked, worried