Haruka Shiraishi Takes Over Gundam Role as Nika Nanaura Amid Yume Miyamoto’s Health Concerns

Earlier in the month on November 14,  talent agency Gekidan Himawari announced voice actress Yume Miyamoto would be going on a brief hiatus, citing poor health, but would continue work under certain restrictions. No specific ailment was given.

Today, the official Mobile Suit Gundam the Witch from Mercury Twitter account has announced that Haruka Shiraishi will be substituting for the actress as Nika Nanaura beginning episode 10, which airs December 11.

In the Witch from Mercury, Nika is characterized as a second-year student in the mechanical department, who belongs to Earth House. She loves mecha, and is very curious about Suletta’s Gundam Aerial. Nika is caring and  known to have outstanding maintenance skill. 

Haruka Shiraishi via Toy's Factory

Affiliated with record label Toy’s Factory and debuting as Sora Matsuzaki in Studio Ghibli‘s From Up on Poppy Hill,  Shiraishi has starred in recent leading roles such as Saltherine “Sally” Aldarake in Peach Boy Riverside, Mira Sou in World’s End Harem, Kosetsu in Shinobi no Ittoki, and Rose Oriana in The Eminence in Shadow.


Yume Miyamoto via Gekidan Himawari

Miyamoto is best as known for portraying Rikka Takarada in Trigger and Tsuburaya ProductionsSSSS.Gridman series. The actress is still currently set to reprise her role as Rikka in the upcoming Gridman Universe theatrical film, serving as a crossover between Gridman and its sequel series SSSS.Dynazenon.

Key Visual

Mobile Suit Gundam the Witch from Mercury is directed by Kiznaiver‘s Hiroshi Koyabashi, and penned by Code Geass scribe, Ichiro Ohkouchi. The tagline of the series is “This witch…rides a Gundam”. The series began broadcast October 2, 2022 on twenty-eight of MBS and TBS TV networks on their 5pm “Nichigo” anime block, as well as simulcasted internationally.  The Bandai Namco Group announced late September at their Gundam Conference Autumn 2022 that the Witch from Mercury‘s first cour broadcast will be completed in December and the series will resume with its second cour in April 2023.


A.S. (Ad Stella) 122―
An era when a multitude of corporations have entered space and built a huge economic system.
A lone girl from the remote planet Mercury transfers to the Asticassia School of Technology,
run by the Beneritt Group which dominates the mobile suit industry.
Her name is Suletta Mercury.
With a scarlet light burning in her pure heart,
this girl walks step by step through a new world.
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