Looks like Kotori and RYU filmed their first music video for DAW yesterday, so maybe we'll get an idea of how cutesy(?) voice actor-y vs metalcore-y Kotori's Vocaloid might sound (eventually). Not sure how long it takes for music videos to be made. Don't even know if they have a YouTube channel yet, either.
There were a lot of selfie tweets about it, but this one implies the music video is supposed to be "cool".
Here's a better picture. RYU is wearing pink and Kotori is wearing blue.
(For clarification to people reading this who don't know about BLOOD STAIN CHILD, RYU is male. He uses #男子 (#male) on Instagram, the band mates said "RYU is not a girl", the Japanese pronoun he uses is "boku" (masculine "I"). Kotori calls him RYU-chan in tweets, so don't get confused if we end up talking more about DAW as we collect information.)
RYU is the guitarist from BLOOD STAIN CHILD, at one point they had a female vocalist who sang normally/melodic and then they would have male screaming to spice it up. So I assume DAW's style will be similar.
Note: This is just assuming that Kotori really is going to be Gynoid's next Vocaloid voice provider. There isn't really any hard evidence other than Kotori and flower acknowledging each other's existence and Kotori saying Vocaloids are cool. It would be kind of funny if she wasn't the new VP. ^^; We'll find out next month or so if we're wrong, but I'm still going to pay attention to DAW while we wait.