Genre: action, comedy, magical girls, ecchi.
Fate/kaleid liner PRISMA☆ILLYA is a Fate/Stay night spin-off manga by Hiroyama Hiroshi featuring Illya von Einzbern as the main character. It is set in an alternate universe where Illya is living a peaceful and ordinary life in Japan with her father Kiritsugu, her mother Irisviel, her step-brother Shirou, and their two maids. However, one day, Illya is chosen by the magical stick Ruby as its new master and is forced by its previous owner, Rin Tohsaka, to become a magical girl and help her in her quest to collect Class Cards, magical artefacts containing the power of Heroic Spirits. To do so, she needs to defeat those powerful Heroic Spirits.
The first series concluded after two volumes and was then followed by an on-going sequel titled Fate/kaleid liner PRISMA☆ILLYA 2wei! It takes place a few weeks after the end of the first manga. Rin and Luvia once again require Illya and Miyu's assistance, this time in order to normalize the unstable Earth pulse which had been disrupted by their previous battles. After the ceremony is completed, something goes horribly wrong and Illya finds herself sitting next to... a clone of herself.
There are about 4 of 2wei! volumes out in Japan so far.