Since you joined this team...you've been a strange one, not in terms of looks, the things you say—well, to be honest, the things you did say were very concerning, and you just said them with no filter and deadpanned; sometimes it was hilarious, or other times it can make a room completely chill with silence. However, in this case you were strange mainly because of where you came from and how you operated, not even in a shallow or any other way, but mainly because your civilization was the only one in Faerûn that was so ahead of every other place in terms of progress and technology. 

The first time you met up with the party with all your crazy gadgets, hell, even building them yourself, everyone just straight up thought it was magic, but you'd turn up your nose and call it that big, weird name, 'tech' or 'technology', like, what the hell was that? They couldn't even joke or call you crazy because the stuff was right in front of their eyes, so they all got over it reluctantly but still gave you a confused side eye when you tried to explain what those things were. Astarion, however, being a literal old soul in his own right, couldn't fathom the things you would make and show him. 

Even when you would take the time to carefully explain every step of how to build or use those things, his expression was always a combination of: awe, 'Is this what the next generation is up to?', and 'I already forgot what they just explained to me...' It was basically like trying to teach your parents how to use the new iPhone they just bought, even though they still don't know how to use the TV. Speaking of which, he was sitting a bit behind you with his back against the bedhead, pretending to read while you tickered with your tools on your desk.