&quot;Milka appears in episode six under the care of Seiren. She is a girl with a cruel past who is trapped in her five-year-old body. Milka lives on an island, and has no one to befriend but Seiren and her white tiger, Rascaless. Her initial caretaker was an older woman who used to whip the child as a punishment for such trivial offences as talking back to her. Eventually, the old woman is killed by Rascaless when Milka isn't watching. Initially afraid of Hazuki and Lilith, she warms up to them and has Seiren take them to the villa at the center of the island.  Milka's world is subject to periodic reality shifts she calls &quot;rip-rip&quot;, during which the sky and the ground rip open as if in an earthquake, only to close without a trace. These drive Milka wild with pain, and she collapses at times. At one point, a &quot;rip-rip&quot; splits the sea, and Milka wanders into the gap, mumbling about crossing the ocean. The rip closes and she is nearly drowned. Hazuki attempts a rescue, but it is Rascaless who saves Milka. Afterwards, Milka realizes Rascaless killed the old woman for her; she thanks him, but asks him never to do such a thing again. Back at the villa, it is revealed that Seiren was grooming Milka to use her magic against Lilith, as revenge for abandoning her. However, Milka apparently has no magical powers even though she does not age. Lilith shrugs it off and tries to reconcile with Seiren, and then sends Milka across the ocean on a ship, at her right age.  In the game, Milka is sent to live on the island by her older brother, for whom she has romantic feelings, because of her poor health. Seiren sings on the cliffs everyday to keep all of Milka's brother's soldiers under her spell, and Milka on the island. She also tries to manipulate Milka through her dreams. After Seiren and Lilith's reconciliation, Milka goes back to her brother with Rascaless.&quot;  by Wikipedia

Hatsuki is a highschool student living with her sister, Hatsumi, who she has a huge crush on. On Hatsumi's 16th birthday, she is suddenly surrounded by a green light and disappears in front of Hatsuki. She manages to follow Hatsumi with the help of a being resembling a fat baby chick (literally), ending up in a place called "The Great Library", which is full of different worlds stored in books. Hatsumi wasn't there, though, so the search for Hatsuki's great love begins and involves traveling from book to book.

[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)