how do u not love that face he looks so happy to see vash again after what, 50 years?? his beloved little brother. he’d gone through so much to get his attention - he built a gang and sent them to kill him, yeah, but the point is he did everything for vash. he sank possibly hundreds of space-bound ships filled with humans to ensure his brother’s safety. he gave him a gun and when his brother turned on him, i’m really sure that’s what made knives snap. not just seeing what the humans did to plants - but seeing what they did to vash. in his mind, vash was warped by the humans. that’s what probably brought his deep-seated hated to fruition. even after vash left him stranded in the desert, knives found him years later and tried to extend the olive branch in the only way he knew - by destroying all ties vash could have to the woman who ‘warped’ and ‘corrupted’ his little brother. and once again, vash turned knives’ own weapon against him. through the whole series, they’re kind of trying to stuff each other’s ideals down their throats without really trying to understand what the other is bringing to the table. vash completely runs away from knives, eluding him and trying to forget what his brother did. he wants to love knives, but he can’t love someone who doesn’t see anything wrong with killing arbitrarily. and knives can’t stop loving vash in a manic way, because knives is probably so fucking nervous all the time that if vash is taken by the humans - or worse, have more scars form on his body - he will genuinely be alone. there will be other plants to save or absorb - but there will never be another sentient plant. there will never be an other vash.
and still, 50 years later, all knives wants is for his brother to love him and be happy and be safe.
(please leave a comment dissecting knives millions psyche. i’m trying to compile all the research on it i can. even if u think it’s dumb just say it because i want to talk forever about knives and i want to hear what everyone has to say)