Looks entirely like Kitten from Gravity Daze.
She even has the same pattern on her headband.

Could it be a cosplay?

keonas said:

Looks entirely like Kitten from Gravity Daze.
She even has the same pattern on her headband.

Could it be a cosplay?

Thought at her first, too.
But there is sadly no information provided (or I can't see it because of the untranslated commentary :/).

Looks to me like it IS her, no question about it. Do the tags on Pixiv confirm it?

Garrus said:

Looks to me like it IS her, no question about it. Do the tags on Pixiv confirm it?

nope, that's why no one made the leap yet.