Me: Yeah Jayvik is a cute ship in fanon, but I don't think there's any sign of it becoming canon to any degree sadly :/
When Jayce and Viktor meet Mel, the camera focusses on Jayce watching her leave with a fawning expression, meanwhile Viktor watches Jayce with a twinge of sadness.
The way Jayce puts him arm around Viktor and says "You should come up with me, we're partners" and Viktor begins to refuse, but he hesitates slightly after looks into Jayce's eyes like this
The way Jayce and Mel's sex scene was intercut with not just Viktor dying, but Viktor rejecting affection from a woman who clearly had interest in him. Both because his project had taken over his life, but also perhaps a sign that his romantic interests lay elsewhere. He could have what Jayce has (romantic/sexual intimacy with a woman) but he doesn't want it.
How in that very same scene as Jayce and Mel climaxed, Viktor collapsed as though wounded or hurt by their act, betrayed even. The way the camera cuts from the scenes of intimacy, to Viktor's eyes made me question whether Viktor was witnessing Jayce and Mel. It was a scene that felt like betrayal despite both events being completely unconnected.
The way we cut from Mel lying alone in her bed after Jayce left abruptly, to the perfect parallel of Viktor in his hospital bed with Jayce waiting by his side.
That it is constantly shown as a choice for Jayce. To choose between Mel or Viktor, but he can't have both. That the two are seen as equally as important to him and it is an intense struggle for him to make that choice.
When Viktor looks at Jayce like this.
When Jayce confronts Ambessa, and is forced to watch her be intimate with her boytoy that bears a resemblance to Viktor (especially with the exact same placement of a mole), and Jayce becomes agitated quickly.
The betrayed/affronted expression Viktor gives when Mel suggests military action in Zaun, and Mel outright ignores his protest and tries to convince Jayce, to which Jayce stands to speak with Mel, effectively cutting Viktor (who is sat down) out of the exchange. The sense of rivalry between Mel and Viktor, as though competing for the same man.
"There is Always a choice" Viktor says, after Mel leaves. Indirectly asking Jayce to choose his way forward, and by extension, to choose him rather than Mel.
They are each other's saviours.