You're talking about Yukie Nakama, which was also coupled with a character from a anime series (forgot that one's name and I'm not aware of what the series is about, but her hair was white and in a bun and in most images, she looked like she couldn't smile, only when forcing her face to do so with her index fingers).
https://en.wikipedia.org/wiki/Yukie_NakamaYeah, she looks like she voice acted a few characters and is/was a actress/singer/idol. Also was the protagonist of this comedy/drama show called Trick where she's this friendless (?) magician girl that cracks down on paranormal activity ala Scooby Doo.
