Kit and Kaboodle (Gameoverse): The whole plot of the Series so far is that Kit and Kaboodle travel to different video game universes and try to stop the hero from beating the villain. No matter how evil said villain is and how much they deserve to get beat down, they are forced to do their best to keep them from getting defeated. Because if they do, that world will immediately start to collapse and kill everyone the hero was trying to save anyway

Phosphophyllite (Land of the Lustrous): Phosphophyllite wiped out all of humanity. While that does sound gruesome, humans at this point in the series have all been reduced to basically restless spirits that all just want to die and pass on, with Phos being the only one who has the powers to fulfill their wish

Pickle (Baki): Pickle raped a helpless reporter. Pickle is a caveman with absolutely no sense of tact, class or morals and has pretty much just been resurrected into the modern world, and the reporter was absolutely asking for it when she thought it would be a good idea to approach him while he was being escorted by the military and try to ask him questions. Questions he wouldnt have been able to answer anyhow since HE IS A CAVEMAN. He wasnt even around when rape or sexual assault were invented as a concept, let alone a word, so can you really blame him for not knowing that this was not the right thing to do when he pretty much had no interactions with any people at all back in his time?

On paper, what this character does is absolutely abhorrent and makes them completely irredeemable. In context, it makes perfect sense and they did nothing wrong at all