thank you for your interest!
Valedictorian is an academic title awarded in the US (and Canada, not sure where else?) to the student who graduates at the top of their class, though for some schools they also consider overall academic record and extracurricular activities (like if there’s a few potential winners or the school has annoyingly high standards–imo). They deliver a speech at the end of the high school graduation ceremony.
Vivian/Vincent has been working toward that goal basically since the day they started high school and it’s common knowledge that they’re probably going to get it. It’s also common knowledge that they’re an unapproachable, bratty stickler for rules with a reputation for snitching, so people tend to avoid them like the plague. by all accounts, they’re a bit of a dick lol