I think we've only seen Shamrock and Higan kill humans, Sakuya killed a subclass, Belkia did drink blood from a couple people but I don't think they died, and Otogiri only stabbed dodo and it wasn't a fatal stab, she only ever strung people up even though this chapter showed she can very much destroy people with her strings.
Like I can see basic fight training being a requirement due to how dangerous being a vampire can be. But it wouldn't surprise me if the 'elites' of team M were the only ones that have actually killed. Like maybe they decided at one point that it was necessary to protect the other subclasses who didn't want to fight.
I'm really sure Belkia has killed before, considering the way he talks and acts... And the stuff from his duo song with Tsubaki is also very stabby-killy xD
Otogiri is true, though even non-fatal stabbing would be a big step or should I say stab? and I could easily see her as having hurt/killed humans before, just not on-screen.
thinking about the expert masseuse Alfred hired for the family that is paid a small fortune annually to provide massage services and ignore so, so many things. No questions, no remarks, just quality service and an ironclad NDA that, if broken, would probably topple said masseuse’s entire family line.
Things Alfred is paying them to ignore, in no specific order:
Bruce’s spinal hardware courtesy of Bane :)
weird amounts of muscle on everyone, even the kids (despite them allegedly not working physical jobs)
scars
FRESH scars
the fact that every joint in Bruce’s body clicks when moved/manipulated at the tender age of 42
Olympic athlete level physiques
rotator cuff injuries across the whole family
scars that are definitely from bullets and/or acid splashes
old signs of what looks like torture (Bruce)
Dick’s entire left arm is basically screws and plates (he “fell really bad” once)
every single family member takes deep tissue massage with max pressure with 0 complaints