Santa rider.
It fits perfectly.

Artist Commentary:
クリスマスパーティー

ニコニコでネットラジオ「フラメガ！」を投稿されているシミーさんのご依頼で描かせていただきました。昨年も描かせて頂いたシリーズで、今年は、色んなアニメキャラでクリスマスパーティーという感じの企画です。今年も楽しく描かせていただきました。そしてこっそり公式のクリスマス企画のタグを付けてみる。

One of these things is not like the other. What the fuck are you doing there Saber? You are dragging this party down with your melancholy.

Rikka and Mei made ​​this image even more special.

Dancougar said:
Pne of these things is not like the other. What the fuck are you doing there Saber? You are dragging this party down with your melancholy.

And...Shouldn't you be dead, Reiko?

lol mei is paler than a vampire.

Are they together for any particular reason? Don't get me wrong, I welcome any image with Mei *and* Rikka, but I don't speak Japanese so the commentary is lost on me.

Please tell me Saber is watching BL.

That cat next to Mei looks like Neko from from the anime K. Correct me if I'm wrong though.

alyss said:
Are they together for any particular reason? Don't get me wrong, I welcome any image with Mei *and* Rikka, but I don't speak Japanese so the commentary is lost on me.

Robo translation says this was done as a request by a contributor who wanted some of the characters from recent anime.

Presumably, they're just the characters the requester/artist really liked most thrown together just 'cuz.

aranox12 said:
That cat next to Mei looks like Neko from from the anime K. Correct me if I'm wrong though.

Yes, it is.
But... I don't know the tags for her. So... Someone can help here?