 Media, who enrolls in class 1-D after her first appearance in episode nine as an archaeologist's assistant, is sent to Peach Moon to keep an eye on Becky. She possesses superhuman strength and is always cheerful. She resembles Ichijo in that she does the seemingly impossible, but she does this much less frequently than Ichijo. She and Behoimi have a past together that they vaguely allude to but never explain fully. Media is nearly always smiling and never &quot;opens&quot; her eyes, except for one instance in episode nine. Also, she is almost never seen without wearing her trademark maid outfit.     In later episodes, she attempts to persuade Behoimi to take on her role as the &quot;healing magical girl&quot; once more, even in one episode putting a smaller version of her magic wand in her hand, trying to invoke a response, but Behoimi does not fall victim to her suggestions. Apparently, she and Behoimi once fought

The 11 year old Miyamoto Rebecca becomes the new teacher of a classroom which is full of weirdos. Despite her cute looks she's a little beast and can be pretty sarcastic and offensive. The school is not safe anymore now that she's in charge of a class and her students, Himeko, Ichijou, Rei and a white rabbit who took a liking to Rebecca help her to rough up the school and the neighbour-class with its teacher "ojii-chan".
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(Source: Anime News Network)

[Blog](http://blog.excite.co.jp/matsukimiyu/)

She was a voice actress affiliated with 81 Produce. Matsuki was a graduate of Hiroshima Jogakuin Junior & Senior High School and Keio University where she majored from the Faculty of Environment and Information Studies. 

Her parents were officially against her becoming a voice actress but permitted her to move to Tokyo and visit the Keio University after she passed an entrance exam for it. After graduating from university she started pursuing her voice acting career and went at the same time to the Nichinare narration school and the Aksent voice acting school, where she later signed under after becoming professional.

She made her debut under her real name, Matsuki Mieko (松木美愛子) in 1988 on Nude Maker's PlayStation game Mikagura Shoujo Tanteidan. But changed shortly after to using a pseudonym instead as to protect her name.

In 2000 she passed an audition and became a member of newly established pop act Up Up under the Akatsuki Project label. In 2002 she got her first major role in an anime tv series, Shichinin no Nana. During the same year, in June, she quit Aksent and signed with talent agency 81 Produce. She became a regular on two radio shows, Sakurai Koubou and Cherry Bell in October 2002. The following years saw her involved with the Da Capo franchise a visual novel, adapted into an anime, where she played one of the main characters, Sagisawa Yoriko.

Matsuki had been under treatment for acute pneumonia since July 2015. She was diagnosed with a malignant lymphoma caused by the chronic active Epstein–Barr virus infection (CAEBV) and passed away on October 27th 2015. A posthumous charity event had its proceeds go to CAEBV research, which, along with the medical history of her rare case, has helped establish the disease's mechanism of infection and possible treatment.

(Source: Wikipedia)