Luxanna Crownguard

私はルクサーナ・クラウンガード、別名「ルクス」、光の女神です。私はガレンの妹です。私の家族はデマーシアの王冠を守っています。初めまして！

Lux presents an energetic and optimistic disposition, being happy and finding humor all the time. However, in more serious situations, Lux's facade drops and she turns out to be constrained and worried about her magic and being found out. She wishes for mages to be accepted in Demacia and opposes the Mageseekers' prosecution of them just because of their powers, sympathizing with Sylas for being unfairly imprisoned. When he betrayed her and started the rebellion, Lux saw him as the danger he truly was, though since the rebellion she has decided to help innocent mages secretly escape Demacia and join Sylas' camp, since being under his rule would be better than being trapped in a nation which saw them only as criminals.While she generally wears typical noble attire in public, she is primarily seen in Demacian armor with a silver-white breastplate and skirt, dark blue leggings covering her legs and arms, white heeled boots to match her skirt and breastplate.When Lux uses her magic, her eyes can sometimes change from blue to bright gold.Lux is the youngest in noble family Crownguard, born with magical abilities she keeps hidden for fear of being executed or exiled from Demacia.
Lux feared of what could happen if her older brother Garen Garen found out about her powers (their uncle was killed by a mage, an event that made Garen show magic users both zero tolerance and no mercy). She believed their mother was the only one who knew, however, she had no idea that Garen and their aunt Tianna Tianna had realized that she was a mage several years earlier, and were thinking of ways to protect her.
Although they are aware of her power, they were somewhat in denial of Lux being a mage herself.
After the events of the Lux comic, Lux got Garen to verbally acknowledge that she was a mage. The two parted ways on good terms.
Galio Galio deems Lux 'the only mage he likes' ( "You. Young girl person. Can you stay and accompany me wherever I go?") and the one that can help him attain prolonged animation periods longer than a single battle.
Lux was apparently the first person to have a conversation with Galio when she was 13-years-old, but he first became aware of her when her family made a pilgrimage to see him when she was a toddler.
During the events of Warriors, Lux would make an appearance during Sylas' attack with the Winter's Claw on a northern fortress, which Garen and his soldiers had retreated to. When things were going badly for the Demacians, she openly reveals her magical power to call for Galio's help, which rallied Garen and his men.
Garen and Luxanna's father, Pieter Crownguard, was a defender during the failed Noxian assault nicknamed Cyrus's Folly. This is likely referring to the same Cyrus who conquered the port city Basilich, which also happens to be the hometown of Darius Darius and Draven Draven.
Lux met Sylas Sylas when he's in prison. They developed certain bonds during their exchange, while Lux brought him food and books, Sylas taught her how to control her power. Later, Lux was manipulated and used by Sylas Sylas to escape Demacian imprisonment after he learnt about the property of petricite thanks to her.