Lugh

History
She battled Levi while the other members of the Trinity Seven were at the Royal Liber Academy. When she defeat Levi

When she was bound by Liese, she overloaded her [Virtus Arm] "Light Piercer Brionac." She had to chose between either breaking one of her weapons or continuing being unable to move.

Abilities
Rogue is a master of high-speed "Luminescence Technique" Magic, and known as the "God of Light." As well as a king candidate. Yui was able to since that see is stronger than the Trinity Seven. Her two flashes move at the speed of light.

She is able to use three thema simultaneously. She is also able to simultaneously possess three holy treasures, that are available only to those who have mastered a thema.

She became a magic king candidate the moment she got her magic king element. Therefore, she decided that a "Last Crest" that puts its user's life at risk was unnecessary.

Legendary Treasures Mode
She can never seem to fully control her strength when in this mode.