I Became an Attack Helicopter and Play an Evil Dragon in Another World

[Picking on the pre-modern world - unconventional magical beast novel - a complicated mix - character-focused - struggles matter more than conquest - social experiment - lots of shooting (probably) - multiple transmigrators - the protagonist is a loli] Usimu is an only child from a single-parent family, left behind in the countryside. Every day, he shuts himself away in the abstract world of his own mind, until the creator of another world transforms him, according to his nature, into the spirit of a crippled attack helicopter. Can he befriend the many others who have likewise been added to this other world, regain his humanity, and ultimately realize his dream? “Getting a chance to live again after death should be something to celebrate. Gaining great power after transmigrating to another world should be satisfying, too. So why do these two good things together feel so bizarre?” A colossal aircraft hovers in midair, its rotor spinning at high speed. Though it hangs well above the ground, the gale beneath it still kicks up clouds of dust. Twin engines provide immense power, alloy armor covers its entire body, and its stub wings are loaded with weapons. Anti-tank missiles, rockets, air-to-air missiles, aerial bombs, cluster bombs, autocannons... The natives of the other world cannot begin to understand this dead, rigid, lifeless evil monster. They can only watch as it destroys in an instant the army their emperor had been so proud of. Even the legendary dragon slayer, Saint Light George, clad in legendary plate armor said to withstand dragonfire, has been reduced to half a body. They collapse to the ground and pray to their chief god: “Merciful and almighty god, is this one of your trials, too? If you can hear us, tell your faithful how we can defeat that devil’s war machine!”