[quote=@KoL]
[@Ryonara]

Holy, Shizuka is tall! The fact that she's twin with Hibiki made me think of them as the same height. This chart is really interesting.
[/quote]

I like to think that it's because Shizuka was raised in Heaven where she obtained the perfect mortal body. Hibiki on the other hand was pretty much raised as a soldier and has had it rough. Never really ate well as a child, suffered a lot of injuries, etc. It wasn't until she reunited with her sister that her life gets better.

I also have some ideas about Shizuka and Hibiki's upgrades. I know I can't apply them right now but I just wanted to let you know I have something in mind.