Talent agency 81 Produce announced on Monday that voice actress and singer Miyu Matsuki passed away on October 27 due to an illness. She was 38.

Matsuki had announced in July that she would be taking a break from her work to focus on treating her pneumonia. She said at the time that she had a fever since the start of the year that wouldn't recede, and then found out she had acute pneumonia after repeatedly going to the hospital for check-ups.

In May, GA Bunko announced that Matsuki would play Charlotte Dimandias in the upcoming anime for Jun Misaki 's light novel series Hundred . The anime's format or premiere date has not yet been announced.

Some of her roles in anime include Kū-ko in Nyaruko: Crawling with Love! , Isumi Saginomiya in Hayate the Combat Butler , Magical Sapphire in Fate/kaleid liner Prisma Illya , and most recently as Anna Nishikinomiya in SHIMONETA: A Boring World Where the Concept of Dirty Jokes Doesn’t Exist . She also performed theme songs for Love Love? , Zoku Sayonara Zetsubō Sensei , and Nyaruko: Crawling with Love! .

Matsuki's fellow cast members and other industry members have been expressing their shock and condolences on Twitter, including:

Yui Sakakibara



"It's finally been announced... I still can't believe we won't ever meet again. The many memories I had with Miyumiyu throughout these many years are living preciously in my heart. She tried so hard. I've been crying since the day I found out what happened, but I'm still so sad that I can't say anything."

Yumi Kakazu



信じられないニュースが飛び込んできた… — かかず ゆみ (@yumi_kakazu) November 2, 2015

"News I can't believe just came my way..."

Megumi Ogata



"I can't... put it into words..."

"Why... did she go... this early...?"

Satomi Akesaka



"I loved Cherry Bell... I wish her peace in the after life."

Hitomi Harada



"It's a lie, right?"

Asami Sanada



"It's a lie. I don't want to believe this..."

Saki Nakajima



"Huh. Miyu-chan...!? Huh? Huh?? This is a lie, right...?"

Haruka Jin'ya



うそだよ。 — 陣谷 遥 (@haruka_2310) November 2, 2015

”It's a lie."

Madoka Yonezawa



松来さん、大好きな先輩です。。すごくすごく悲しい…… — 米澤 円 (@yone_mado) November 2, 2015

"Matsuki-san was my beloved senpai... I'm really, really sad..."

Mai Aizawa



今年の2月にイベントでご一緒した時はとてもお元気そうだったのに・・・ショックすぎて言葉が出てきません。 — 相沢舞 Mai Aizawa (@moririnmonson) November 2, 2015

"I was at an event with her in February, and she seemed so full of life... I'm in so much shock that the words won't come."

Aoi Nishimata



"What...? I've just heard that the voice actress Miyu Matsuki has passed away... Why...? I know Matsuki-san from when she played the heroine Akane Mizuhara in Final Approach ... I really can't believe this... It's terrible..."

Ayana Taketatsu



え、うそ。 — 竹達 彩奈 (@Ayana_take) November 2, 2015

"Huh? No way."

[Via Hachima Kikō]