It seems Hikaru sounds much better here then she did in Budokan. Maybe she read our posts and decided to practice her "nice" voice more
Watching it twice it seems extremely true actually. I didn't notice the first time through. There are lots of telltale signs that show she's gone to a vocal coach or something. Her jaw is dropping a lot more which makes the sound project louder and further which means it's not at the back of her throat like in Budokan. Her eyebrows are raised, that helps with higher notes and lastly she's smiling way more which helps correct pitch and brighten tone.
These signs are actually really noticeable in the
Gogatsu No Mahou video way back last September during the kaijurago, and she's definitely improved on these techniques too.
It makes me super excited for the FOTW DVD that's releasing
EDIT: Watching that Gogatsu video and the recent TV size KNGNN they did it seems ALL of them are using the same techniques to some degree (though mostly Hikaru.) There's even
this part in that TV size where Wakana seems to turn her regular open mouth into a small smile too. (Though perhaps I'm being over analytical.)
I wonder if they've actually gone to a vocal coach or they just picked up these tips from Keiko (since I remember Hikaru often saying that Wakana and Keiko used to give her breathing exercises to help with the long Magia notes)
Keiko's always been doing this sort of thing since she's been with Kaijura. Her jaw has always dropped the furthest and she's always smiled the most (even in more darker tone songs.)
The only thing Keiko's never done is the eyebrow thing. There was one time where she pitched a note while looking upwards in AE's Mune no Yukeue (seen
here.) Though that's a bit different. One of my personal singing teachers said "Think up while singing down and vice-versa it helps your notes come out" (since I had trouble singing a high note at the time.) Either that or she was remembering/pitching that note since there's quite a large jump between that note and the next. Either way it's not the same. Perhaps all 3 of them are going to a vocal coach together. I've never seen Wakana smile so much either.
Anyways these are just kinds of the things I notice. I've been in almost every single choir at my school and I take singing quite seriously since it's one of the only skills I'm on a level playing field with everyone else in (since my disability can't affect my singing.) All of these techniques have been pointed out to me by my choir teachers over the years and Kalafina is very similar to a choir (Keiko says so herself in many ways, especially about her role in Kalafina.) So it's only natural they'd all be using these techniques. I don't know how many times I was like: "Smile more Hikaru!!" During the Budokan DVDs so my prayers have finally been answered.