Aki Hikowa (Earth-8573)

"You are an idiot. The Captain rates the honorific 'sir'. You will render that honorific or I will kick your ass!"

- - Lieutenant Aki Hikowa to Ensign Hall Dowski

Lieutenant Aki Hikowa was a human officer in the UNSC Navy, attached to the UNSC Pillar of Autumn under the command of Captain Jacob Keyes.

Battle of Sigma Octanus IV
By 2552, Lieutenant Aki Hikowa served aboard the UNSC Iroquois as its weapon officer, under Commander Jacob Keyes. She became a veteran figure of the First Contact War, surviving three battles against the Covenant and becoming a "sleepwalker"-like figure. Following the victory at the Battle of Sigma Octanus IV, however, she became enthusiastic after the pivotal battle.

UNSC Pillar of Autumn
Hikowa was then transferred to the UNSC Pillar of Autumn, Keyes' new ship after he was promoted to Captain by Vice Admiral Hieronymus Stanforth. She met with Keyes once they arrived in the ship, giving him a rundown ordnance of the Autumn. During the Fall of Reach, she continued her role as a tactical officer.

During the Battle of Installation 04, Hikowa was part of the Autumn's bridge crew who escaped aboard a Class-3 Bumblebee alongside Keyes. When the captain killed an Ossoona, she remained expressionless.

Death
Hikowa and the rest of the crew were captured by the Covenant once they were betrayed by Ensign Hall Dowski, who led Covenant soldiers to them, unaware they would not take any prisoners. She prepared to kill Dowski, but one of the sangheili soldiers killed the Lieutenant by shooting her in the forehead with a Type-25 plasma pistol.