Oh yeah, I remember these guys from the "Favorite character of the user above" thread.
I don't have a lot of futuristic characters. Let's see now.
There's Eyveri Eochaid Tinuviel, who was for a cyberpunk fantasy roleplay. Basically a bloodelf (vampire) drugdealer. From what I hear I accidentally managed to recreate the backstory of Walter White without ever seen an episode of Breaking Bad?
Alaya Vipin Engel, she's no-doubt the most developed of my sci-fi characters. She started out 8-7 years ago as just some recurring androgynous person whom I used to practice drawing robotic wings and somehow evolved into this coffee-addicted military drone who was actually really fond of bright colored clothing. Lots of the stuff on her charahub page is from the main roleplay series I used her in though, which might make some bits nonsensical to read. Involuntary timetravel, a setting strongly based on Mass Effect and Starcraft. Was fun though.
Finally there's my own take of "the android builder" type of character - Doctor Netzen Ashdown. She's not really finished nor is her profile normally even visible because I feel a bit weird showcasing characters who don't even have my own doodles to illustrate them. In theory she's a brilliant scientist who specializes in coding AI's. She's also got social phobias, to the point where she has her custom AI android deliver speeches and attend social events for her.
Don't think either of them will be elaborated on much further unless interest in that roleplay gets rekindled. Which is a shame, roleplaying a robot-creator dynamic with another person would've been interesting.