Mostly in regards to the connection between Light and Gamebreaking, to extrude as much meaning from something as possible, no matter the harm caused. I think that lines up with what we understand "Chara" to be in the Genocide Route, which is an embodiment of completionism itself, with the whole crux of Geno being about pushing the game to be a horrible, painful experience just to see what happens.

I'd say that also connects to Chara, the human, a litttle bit(The alarm clock dialogue says Chara would always fill their water glass to the very brim, something that feels like a small bit of connective tissue between the kind of person they were in life compared to what would take their form in death. Though maaaybe I'd give them a different classpect altogether, anyhow).