So Chen is Chinese as well? As I recall, the palm fist greeting is derived from Chinese Martial Arts.
As far as I know, the nine tail fox is Chinese too.
By the way, if you crack your knuckles, you'll end up with what she's doing. Though I don't know if she's greeting or craking knuckles.
Reisen Udongein Inaba!General Winter has arrived, along with an avalanche of ice and snow!What winter left behind, Letty Whiterock!You'll get washed away by her wave of insanity! It's the lunar rabbit of madness,With an inexhaustible supply of attacks, a Shikigami with no weak points!The Shikigami of the youkai of boundaries, Yakumo Ran!The black cat of bad omens, Chen!This animal-turned-youkai will shock you with her agility and cleverness!