User blog comment:ChishioKunrin/No Brakes - My reaction/@comment-24891101-20141024043135

Glad you could make it.

There's actually plenty of evidence for Vermillion (Maki's name) being Raven. Other than the foreshadowing, there's the bird motif, which aligns with Qrow and the Transient Princess, and her red eyes (Not just the Grimm mask; she blinks.) and her fashion sense (the asymmetrical skirt). Plus Yang caught a glimpse of her, clearly for story purposes.