Ushiwakamaru, Class Name Rider, is a Rider-class Servant summoned by Ritsuka Fujimaru in the Grand Orders of Fate/Grand Order.
She is also summoned by Rurihime "After" the Holy Grail War in Fate/Requiem.
Better known by her adult name Minamoto no Yoshitsune (源義経), she was the most famous military commander in Japanese history. Probably only someone like Oda Nobunaga possesses a popularity that rivals hers... However, there are many obscure points in regards to history, and especially the early half of her life from before raising an army is wrapped in mystery.
Ushiwakamaru is a genius swordsman that wholeheartedly adores her older brother, Minamoto no Yoritomo. She respected him as a samurai and loved him for being her brother. Although she tries not to be boastful, she says that he was the most exemplary older brother in the world.
Ushiwakamaru likes to have fun. When she was a child, she was rather mischievous since she spent her days playing pranks on adults as a hobby and causing trouble for the monks, all while laughing out loud. Though she is not like that any more as she conducts herself properly to the best of her ability.
Seventh Singularity: Babylonia
Ushiwakamaru is one of Gilgamesh's Servants, along with Musashibou Benkei, Leonidas, and Merlin. She and Benkei hunt the Demonic Beasts surrounding Uruk.
She is almost constantly defending Uruk, such that she cannot venture with Ritsuka when they need to go out and investigate things.
[Spoiler] In the movie, Ushiwakamaru seemingly dies after unleashing Dan-no-Ura (Eight-Boat Leap) in the fight against Gorgon. Kingu finds her near death and captures her. He originally intended to turn her into a Demonic Beast, but after speaking with her decided to turn her into one of Tiamat's children with the Chaos Tide. She is later seen fighting Ritsuka as Chaos Tide Ushiwakamaru. [/Spoiler]
Fate/Requiem
Ushiwakamaru is the Servant of Rurihime. She works part-time making tempura manju at a stall at Yushima Tenmanguu, the shrine run by Rurihime's family. Rurihime calls her by the nickname Shana (シャナくん, Shana-kun).
Ushiwakamaru participates in the Holy Grail Tournament as part of a team alongside Barbarossa and Jacques de Molay. The emcee Circe introduces her with the name Minamoto Kurou Yoshitsune (源九郎義経). She reacts uncomfortably towards cheers of "Ushiwaka" from the crowd of the tournament, but eventually responds to the cheers by waving.
(Source: TYPE-MOON Wiki)
