User blog comment:DiegoAnime3000/Weiss the tsundere?/@comment-10380701-20140604093326

She only looks like a tsundere on a surface level. She's actually only partially a tsundere, like a baby tsundere or whatever.

Personality-wise, she's closer to two personality archetypes: Bitch in Sheep's Clothing (She acts like the 'perfect' student in front of professors, then berates the shit out of everyone not on her level) and the Alpha Bitch (*ahem* Ask Ruby for more details)

Then there's the fact that she has her sincere moments (when she saved Ruby, and reconciled with Blake), adding in a Jerk with a Heart of Gold trait.

To describe Weiss as a tsundere is to describe Cloud Strife as emo.