Himiko (Character)
Himiko is a minor character who appeared in multiple pieces of Madoka Magica media, who was based off a real-life queen by the same name.
In Puella Magi Madoka Magica
Himiko first appeared in Episode 11 in a stylized segment featuring historical Magical Girls. She later briefly appeared as one of the Magical Girls that Madoka Kaname saved in Episode 12.
Himiko's name and year of ascension to queen referenced in Runes, in episode 11.
Himiko's Soul Gem.
Key Animation Note, Volume 6.
Production Note. Himiko's Soul Gem emblem is in the top left corner. Note that the emblem is clearly labelled Himiko (ヒミコ).
In the Tiro Finale Book
Himiko received an illustration by Ryo Imamura, along with other Magical Girls saved by Madoka in Episode 12.
In Puella Magi Madoka Magica Mobage
Himiko had a card in the mobage, based off her Episode 12 appearance.
In Puella Magi Madoka Magica Portable
Himiko appeared similarly to the way she appeared in the anime's 11th episode, down to using the same stylized image.
In Magia Record
Himiko first briefly appeared in Ultimate Madoka's 2nd Magia, appearing similar to the way she did in the anime's 12th episode.
Later, she appeared in the Puella Historia The Heiress of Yamatai Arc story as a NPC with a new design by GAN and a Live2D model. Most notably, this iteration of Himiko is not a Magical Girl, instead playing a supporting role as Toyo's mother and predecessor.
Himiko's face settei from GAN's Twitter.