Armor Hero: I Transmigrated into Lufa's Niece

(Armor Hero 1 and Armor Hero 2 are connected; the details of Armor Hero 3 are currently unknown + help Lufa ascend to the throne and become king of the galaxy, changing the Phantom Army’s tragic fate + gender transformation into a woman + cross-dressing + no female lead for now)

A young man from the twenty-first century has his soul transported to Planet Ares in the galaxy.

He becomes the niece of the future commander of the Ares Armor Corps, a man who will wield great military power on that planet. From childhood, she grows up alongside Lufa.

From birth, she possesses the Summoner for the Shura Armor and receives careful instruction from Lufa and the six vice commanders and commanders of the Royal Guard. Eventually, she becomes the second most powerful figure in the Royal Guard, after Lufa.

Then one day, rumors spread across Planet Ares that Lufa intends to usurp the throne. King Peel, ruler of the galaxy, condemns his royal guards as level-three criminals guilty of greed, anger, and delusion.

Lufa then leads his troops in a breakout from Ares and launches a frenzied campaign to seize cosmic energy crystals.

At last, when everyone reaches the outer reaches of the blue-and-white planet, they prepare to plunder its energy crystals.

After waiting thousands of years on Earth, Louis is overwhelmed with emotion: You’re finally here...