Eugene Rantz was a secondary supporting character in the 86 -Eighty Six- series introduced in Run Through the Battlefront.
Eugene was a second lieutenant of the 177th Armored Division of the Federal Republic of Giad. As the son of former Alba nobles from the fallen Giadian Empire, he enlisted in the Federacy's army to help provide for his younger sister Nina. He was well regarded for his Feldreß piloting skills.
(Source: 86 Wiki)