This arguably goes a bit beyond "tiny and insignificant", but still: Aloy's social acumen in Horizon Zero Dawn. This is a character who literally nobody but her adoptive father was allowed to interact with for literally her entire life, but when the game proper starts she's warm, empathetic, charismatic, witty, and both psychologically and socially perceptive. Hell, a good chunk of the investigations she performs owe their success as much to her understanding of human nature as they do her Focus's ability to highlight important clues. It's easy to miss, but if you stop to think on her backstory, her social skills feel...out of place.
Eg, I just finished the Sun and Shadow sidequest, wherein we see one of the characters grieving and say she isn't okay, but "will be". Without missing a beat Aloy immediately picks up on the suicidal subtext, talks her out of it, and wastes no time in telling the girl's father that he urgently needs to listen to and support his daughter. Picking up on that subtext and helping someone who is suicidal is a deceptively tall order at the best of times, but it should be completely outside of the skillset of someone who literally hadn't so much as had a conversation with anyone but her father (and later, that one merchant) until she turned 18.
It's really weird to me when the devs say that - and I quote - "because she grew up as an outcast, Aloy's someone who really hasn't ever learned all the tricks of the social world", as her writing really doesn't seem to reflect that. This is someone who catches suicidal and romantic undertones and expertly navigates them, has the sense to ask about who might have had motive for a crime and pieces together interpersonal implications that escaped eyewitnesses, puts a few people in their place by outmaneuvering them conversationally, and psychoanalyzes the guy flirting with her, calling it out as a coping mechanism as Aloy reminds him of his recently deceased lover. For someone who "hasn't ever learned all the tricks of the social world", she is remarkably good at navigating them.
Now, let me be clear, I like HZD, and I like a character that can do that. I love playing the party face. It just bugs me that in this case it feels at odds with her backstory, which is quite explicit in how she had no socialization. I think the worst part is that in hindsight they actually supplied the perfect 'out' with the Foci's communication capabilities. Give her one or two 'online' friends to talk to and share thoughts with as she grew up and it becomes a lot less weird.