I feel like Luke’s patriotic aspect gives a unique take on the archetype of “the guy who hides his insecurities behind extreme promiscuity”. I do, however, feel as if that detracts from his character a bit because that basically is his personality and it’s what most of his dialogue and actions are based around. There’s just kind of a half-empty archetype with a bit of a backstory. I do feel like if his personality is fleshed out a bit more and the MC has a chance to delve into his thoughts and behavior and such (maybe get him drunk and have a candid conversation or something like that), he will definitely be a compelling character.
Your comment is reassuring in a way. Luke indeed is the kind of guy who hides his issues under many layers of vices, and that's something we intend on addressing on his chapters (they are optional; you can pick which guests you hang out with, you'll see this content if you choose to.)
I can say Luke is a character for whom we have some fun ideas. As you put it, "maybe get him drunk and have a candid conversation or something like that" is definitely something we can do!
Thank you for your feedback.