Aya Brea

Character from Parasite Eve. Beautiful, slim, female, special police agent, with powers due to her special mitochondria. Blonde. Green eyes. Slim. Her sister Maya is believed to have died in a tragic accident, and she received her corneas so she wouldn't go blind from it.

tonight being Christmas Eve 1997) goes horribly wrong. As the only person in the area to not have not-so-spontaneously combusted upon the awakening of Mitochondria Eve at Carnegie Hall, she struggles to understand and rein in her own bizarre powers while racing to stop Eve from giving birth to the Ultimate Being and destroying and/or forcibly evolving humanity in the process. She's immune to Eve because they share donor organs from her twin, Maya. More on that further down.
Aya returns in Parasite Eve 2, set three years after the events of Parasite Eve as an ace operative of the FBI's anti-mitochondrial mutant task force, MIST (Mitochondrion Investigation and Suppression Team), formed following reports of Eve's mutated animal minions spreading out from Manhattan. Aya's journey to destroy the newly-monikered "Neo-Mitochondrion Creatures" (NMCs) and put a signal on her own unpredictable powers leads her to Los Angeles. However, an investigation into an NMC outbreak near the ghost town of Dryfield, Nevada hits closer to home.

Action Girl: Aya is a tough as nails woman who is a proficient shot with firearms and has latent powers at her command, being a One-Woman Army who can easily hold her own against a horde of monsters.
Bizarre Human Biology: Aya possesses a more benign/passive form of the "evolved" strain of mitochondria serving as the first game's Big Bad, which are not only a self-aware Hive Mind that can hijack their "hosts" and act like The Virus, they possess actual superpowers, which include spontaneous combustion and Body Horror transformations!

She's wearing denim pants for much of the first and third games and the first part of the second, the last game mentioned she's wearing a denim jacket for the duration of. The third game example is a subversion though, as it's actually Eve on Aya's body by that point.

Half-Japanese, as a nod to the novel

Aya's mitochondrial powers lack the villainous insanity and Body Horror that other people in this series go through—she received the "special" mitochondria when she was still a child, and unlike Melissa, Aya's mitochondria evolved to the point where they are symbiotic with her body and work with her instead of taking outright control. However, they also keep her body younger than she really is, since a youthful host is advantageous.

Maya's cornea (which possessed Eve's mitochondrial power) was transplanted into Aya's right eye, and Aya's visions are actually Maya's last memories.