Meta Lium is a skilled ace of the Bacterians. She serves them with fierce loyalty and has become one of their most skilled Riding Core pilots, nearly on the level of the Sisters themselves. A stoic and determined woman, she has a weakness for cute things and considers the Sisters the most adorable things in the universe. She can sometimes be found acting unprofessionally when she thinks they aren't looking.
Like Tita, her eyepatch suggests it conceals the interface to Big Core DX weapon system.
In Otomedius Excellent, Meta Lium returns to take vengeance against the squadrons, but instead, she is shot out of the sky from a laser blast by the Old Big Core. Her fate remains ambiguous as Tita Nium notes that she probably survived.