This has been bugging me for a long time and needed to finally post this somewhere and i have never seen anyone ever bring this up. There is a decent chance i am just really stupid though. In ac 5 act 1 one of Karkat's most relevant motivations is not wanting the other trolls to find out about his blood color. Only issue is, he spends the entire act wearing a shirt with the cancer symbol on it. And you May be thinking something along the lines of "But he wasn't interacting with the other trolls in person for the hole act." But may i remind you, Trollian has a view port feature. And even if the others didn't know what the the cancer symbol was, they would most likely think "Huh, that symbol on his shirt is where his blood cast would go, but that symbol isn't any of the eleven castes. huh." Am i like, supposed to just suspend my disbelief on this or something?!? If I'm wrong I'm stupid for missing obvious answer, and if I'm right I'm stupid for liking such a shitty webcomic this whole time. /j
