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Luxanna 'Lux' Crownguard, the Lady of Luminosity
A human Champion from Demacia in League of Legends usually played as a bottom lane Support or an AP Mid. She serves in the Demacian military as a skilled and powerful but young magician, capable of copying spells she witnesses and using magic to hide in plain sight. She is known for having all skillshot abilities, her light magic and her plethora of references and memes. Garen Crownguard is her older brother.
She is rumored to have been inspired by Touhou's Kirisame Marisa in appearance, skills and quotes. Miyuki Mitsuhashi (Shurelia), who designed Lux while she was working at Riot as a game designer, has confirmed that anime, including Cardcaptor Sakura, provided a lot of the inspiration for Lux. Her Ultimate, Final Spark (formerly Finales Funkeln), is comparable to Master Spark.