So I've been considering RWBY a western-made anime because it adapts the style quite well and Japanese mangaka actually made manga anthologies of it. Then there's the inclusion in BlazBlue Cross Tag Battle. So like any anime, the characters may fall under certain 'dere' personality types.
Let's start with Blake, since she's easiest to categorize. I'm pretty sure she's a Dandere. Everything checks out: she's softspoken and mostly quiet, basically harmless unless you provoke her, head's always in front of a book and is only talkative when around her friends.
I think Weiss can be considered Tsundere Type-A with what we've seen so far. She sports a cold and uncaring facade, but can be compassionate and protective once she breaks down her barriers and you get to know her.
Ruby and Yang, on the other hand, are quite challenging to categorize. By default they have the Deredere personality. Ruby, being socially awkward, can also lean towards being a bit Dandere. Yang may revert to being Tsundere Type-B due to her temper and her impulsive nature. I can be wrong though. What do you guys think?
Hmm if we're talking about other archetypes, Genki Girl fits quite nicely for Ruby. Yang would peg me as motherly onee-san archtype since she is only flirty in the trailer and it vanished within the actual series.