This about section was done by Seiyuuki. The Black and White scans are from #manga-rain and the one colored scan is from a manga cover scan from the Chinese manga.

About
  Mari is the adorable but creepy dollmaster, youngest member of Hanagumi, a group made out of Hao's female follower. (Kanna, Mari,Macchi) As quiet and creepy Mari is, Mari is also the strongest member of Hanagumi, with the highest furyoku among these three girls. Her full name is Marion Phauna.

Stats
Birthdate: 28/2/1987
Furyoku: 8000
Hobby: Probably Dolls

Spirit
Chuck is her oversoul. It's a battered up doll on which she an oracle bell on it's left arm. Chuck's right eye is hanging out, wears a cowboy outfit and has a gun :D. It reminds me of Chuckie >.> which with no doubt is where some of the idea came from.

Other things
Mari likes to talk broken english sometimes. She seems to be the more suttle one of the Hanagumi. In general, she'll say a few words, like "I like" or "I am bored" and such. She is very cute :D...
In relation to the Funbari Onsen group, Mari tends to be paired up against Anna whenever she appears-- so she must be pretty darn strong :p
*spoiler* Mari is later killed in a fight with the X-LAWS, and Hao tries to devour her soul along with the rest of the Hanagumi (Volume 30) to gain Reiroku. Mari and the rest of the Hanagumi end up becoming friends with Anna since she saves them.