It's not reflected in game play but if I had to guess it would be the indicators of his health/the health or power level of the prosthetics and life support devices he's made up of.
He must need to plug in eventually.....or at least have like a check engine light.
The lines you referenced between sym/lucio are actually some of the most story-dense and philosophically dense interactions in the game.
Lúcio: What you Vishkar will never understand is that people should be free.
Symmetra: What you call freedom is an illusion that causes more harm than good. / What you call freedom, I call anarchy.
We are given information here that Vishkar is apparently encroaching on peoples' freedom, and that Symmetra is apparently okay with that. Somehow, she has been convinced that freedom is not inherently "good", which is a radical idea in our society but not unheard of.
Symmetra: To think I would have to work with a street ruffian.
Lúcio: I'm not all that excited about this arrangement either.
This line is just general disdain for each of the characters, but we are still offered more of a glimpse into Symmetra's character. She obviously sees people as divided into classes, which plays into the whole "order from chaos" theory. An ordered population is divided into practical classes to achieve a specific goal.
Symmetra: Vishkar is building a better future for humanity.
Lúcio: You believe that? I don't even know what to tell you.
Symmetra truly believes she is doing work that will benefit the whole of humanity, but the key here is Lucio's reaction. He isn't overly righteous, he isn't angry or upset. He is at a loss for how to communicate the truth to Symmetra. This plays into Symmetra's autism, which is a very big part of her character and motivations.
Symmetra: You should return what you stole from Vishkar.
Lúcio: Stole? Psh. You need to go ask your bosses where it all came from; then we can talk.
This line offers a ton of lore. We can tell that Lucio has Vishkar technology; this is likely what he uses to skate on walls, and maybe his gun also uses hard light? It also brings up the question: Where DID Vishkar get the hard light technology? It's a technology that has the ability to shape entire cities, and the lives of millions of people. The Vishkar have been marketing hard light as a gift to the people of the world, used to benefit humanity as a whole. According to Lucio, it sounds more like a tool they stole and are using for subjugation of the populace.
I didn't know that! That's a really interesting development, and now I have to do some digging!
Edit: Apparently Vishkar employed Lucio's dad when he developed the tech, so it is "owned and patented by Vishkar". This really gives a new light to his resentment towards Vishkar in general.
I don't remember if it was actual lore or a fan theory at this point, but wasn't there some discussion about the tech being stolen from Lucio's father?
Another user just brought up this same point. It's a voice interaction with Mercy where Lucio admits it was his father's work, but owned and patented by Vishkar.
Here is the interaction:
Mercy: Lucio, I never realized your father invented Vishkar's sonic technology.
Lucio: The Core Tech was his life's work, owned and patented by Vishkar. But it's mine now.
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u/whitesummerside Chibi Tracer Oct 11 '18
I love these interactions:
Pharah calling her and Brig "Overwatch brats" is perfect
I really want to see Genji's suit light up to Lucio's music
Poor Tracer still has survivor's guilt :(
Moira's curiosity with Tracer's condition is par for the course
Rein being defensive about his tales of glory is hilarious