What really disgusted me with Yakuu (and makes me think she's the worst) is the scene with the Manor Thieves. Those guys broke into the manor of a giantess and beat her slave, a crime worthy of enslavement according to Homaspernia's laws.
But said giantess wanted to kill them so Yakuu gave her permission (and Nyxmay gave her the means) to fake her servant's death so they could be executed for a murder they didn't commit. AND THEN Yakuu joined that giantess in murdering them, knowing they weren't guilty/deserving such a punishment.
Actually that's a really good point, I totally forgot about that.
That also plays into something else for me, in Maryen's corruption route/Kendra's route, one of the main points of contention between the sisters is the views on punishment, Maryen (in her purity route) denouncing capital punishment under any circumstances and believing all are capable of redemption, while Kendra argues the opposite- what kind of bothers me is that there's no ability to argue for a middle ground, and point out the big problem with Homaspernia's usage of capital punishment; they utilize it as entertainment, and because it's entertainment, that incentivizes guilty verdicts, especially (finally coming around to the Yakuu point) twisting evidence to make a crime appear worse in order to get a capital punishment for those who under the extremely tractable "law" didn't deserve it.
There's no means in-game to say "some people absolutely deserve a quick death, but making it a form of entertainment merely turns guilty verdicts into a commodity, and people always want to capitalize on commodities, and will circumvent law and righteousness to do so, which is why Kendra's argument has no leg to stand on."