
Wait hoooold up, I'm cooking something, he's going to want to kill the new caterpillar that's eating away at his shiny new thing. Which will in turn make our mc want to kill the new guy trying to get at her fucking caterpillar. Main conflict is going to be centered around her wanting to protect her brother and out lawyer thinking the brother is a leech oh my goooood I love plot

I don't think so, as he hasn't actually driven his sister to suicide! He just murdered her, while she was looking forward to the future. I think the mc is actually in a different position than his sister. In one of the chapters (maybe the latest?) he repeats to her, that she shines, and then it zooms in on his pen and his watch. I think he doesn't see her as a caterpillar, but more like the flower he wants to possess.
Nice nice nice, caterpillar as metaphor for siblings, he killed his sister to take what's hers and she killed what tried to hurt him to protect him, nice nice nice I like your magic pictures author man