I'll start off by listing mine:
The T-800, Terminator 2: "I know now why you cry, but it's something that I can never do." Gets me every damn time.
ADA, Zone of the Enders: I think I'm the only one who played this game more than the MGS2 demo that came with it. I will never not laugh at the exchange of "You may speak like a human, but you're still a heartless computer, aren't you?" "That is correct. What is the problem?"
Codsworth, Fallout 4: He survives the nuclear holocaust despite not having a bunker and waits 200 years for you to come back. When you look at what changes his relationship with you, he mostly just wants you to be nice to people. I never swapped him out as my companion.
B.O.Y.D., Ducktales 2017: He's adorable. 'nuff said.
Curly Brace and Quote, from Cave Story: They’re hot as hell and carry cool guns, what’s not to love about ‘em
Uzi Doorman, from Murder Drones: Goth girl undergoing a minimum of three emotional crises at any given point ranging from a neglectful dad to harboring an eldritch antivirus (it makes sense in context, trust me)
Hatsune Miku, from Vocaloid: Listing her purely because not a single one of you did
GlaDOS and Wheatley, from Portal: Perhaps two of the most engaging fictional characters I’ve ever come across, my archetypal girlboss and failson (at least in aura), respectively
In addition I also have like four robot OCs so far lol