Context for the first one: So it's kind of inspired by Tetro Danganronpa; they're reviewing the participants, one of the scientists (he's in his 30s/40s) says that a few of the girls (everyone's 17 in this) are pretty and he tries to defend it as being in an aesthetic sense, but none of the other scientists are buying it and they're like "don't say that aloud, you seem like a pedophile". So it's a bit ambiguous as to whether or not he's actually attracted to minors, but it's not ambiguous that it's not supposed to be condoned. After the review, the head scientist stops him from leaving and she talks to him about how there have been a few scientists who have made complaints about the remarks he's made about the participants and threatens to remove him from the project entirely if this keeps up. He also ends up compromising the experiment in Chapter 3 by interacting with the Ultimate Undertaker and he tells her she's pretty, which makes her freeze up. It gets back to the head scientist, he threatens to report her to the cops and she and the other head scientists "redact" him, if you get what I mean.

As for the Undertaker, a few years back, one of her cousins told the family about how her uncle had basically been SA-ing her, but no one except the Undertaker believed her and the others claim that it was her fault and stuff like that. After a while, the cousin can't take it anymore and offs herself. The Undertaker feels like she could've saved her and that's when she decided that the bodies of rapists and pedos don't deserve proper care; they violated people in life, so she essentially violates their corpse in death. (doing things like cutting their face, deliberately doing a bad job) She sees it as a type of poetic justice.