User blog comment:DiegoAnime3000/Weiss the tsundere?/@comment-11188061-20140604064054

She has tsundere traits, but I agree that she's hardly the complete tsundere as many people ilke to portray her to be (thank the gods, I was halfway giving up on her when Episode 2 came out, and the impression didn't change until much later due to the mediocrity of the plotline).

She does act cold and hostile towards other people. She's extremely straightforward and will spit on anyone she disagrees with given enough fuel to light the flames.

On the other hand, it takes her a long time to get over her initial emotions, and respond. She is unable to forgive immediately after said incident had happened. She can harbor hostility and negative emotions for a long time - and likely did, until she got over it after White Trailer I assume - but she had learned since that even if she might not choose to let go, she will respond and address directly to the problem. That is a respectable attitude.