The Clan Invasion prompted the Draconis Combine to field new technologies. Though much of this effort focused on 'Mech forces, fighters also came under scrutiny. The need to quickly field advanced equipment prompted the DCMS to favor an upgrade program, but the Combine also pursued new designs. Unfortunately, production facilities for the first dedicated new-tech fighter, the Sai, were overrun by Clan Smoke Jaguar and not recovered until 3059. Additional efforts focused on OmniMech technology, namely the Tatsu OmniFighter.
         It wasn't until after developing the S7-version of the Sai that Wakazashi's efforts once more returned to building a new non-Omni fighter. The conflict with the Ghost Bears and Federated Suns delayed completion of the project-more effort was put into production of proven designs-and the new aircraft wasn't flown until 3066, too late to have a major impact in either conflict. It did however fight well during the Jihad, until the destruction of recovered Star League technology began to hurt the design.
         They quickly began working to "downgrade" the design, but after talking to Rurik Drascir of Luthien Armor Works, chose to add a small surprise to their fighter. Called the Oni, it was named for the Oni (demon) of Combine legends, and has been just such a nightmare for every foe the Combine has fought since.

         In some regards, the new ON-2 has a number of similarities to the older S7, principally in its performance and use of MRMs and lasers as armaments. The heavier Oni mounts a single Shigunga MRM-30 launcher in the nose, with two tons of ammunition allowing sustained volleys. A pair of wing-mounted Diplan M3 medium lasers provides heavy short-ranged firepower, though once the Shigunga runs out of ammo the Oni rarely remains in battle.
         The Oni is slightly less maneuverable than its lighter sibling (though it can still achieve Mach 2 at low-level) but has better armor protection in the form of 8.5 tons of the new "Obakemono" Glaze laser reflective armor. The Oni has been well received by the DCMS, who appreciate its combination of resilience and hard-hitting firepower. Only its poor endurance has drawn criticism, though this merely limits the missions appropriate to the design.

         The Oni fought well during the Jihad, deployed throughout the Draconis Combine to fight the Word. When central control of the outer systems collapsed, many Oni stayed behind and so are common in the non-aligned systems. One of the primary fighters of the Draconis Combine, they can also often be seen escorting larger DropShips and WarShips.