"Marina" claims to be a philologist and posts videos in heavily accented (russian?) english talking about the origin of english words.
She's also quite attractive (probably an older model, i would guess) and sprinkles her vids with pinup pictures of herself.
She's been around a few months. Her most recent vid is the most viewed of the day, which I noted is the second time she's been near the top of the most viewed in the last week.
No question she's an actress, i am sure. its kinda weird to think that "marina" may have developed by trying to exploit the appeal of the "nerdy" side of Bree and combine it with the raw appeal of racy thumbnails long present on youtube.