Life with an Ordinary Guy who Reincarnated into a Total Fantasy Knockout

The maid is really Kalm in disguise, working with Vizzd and infecting Ugraine with dark energy to destroy Ishruna. The people whom Schwartz defeated snapped out of Hinata's charm and quit, so Kalm and Vizzd take Hinata and Ugraine to the royal armory, which can only be unlocked by two people of royal blood; Hinata counts because she was chosen by the Goddess of Love. They retrieve a giant mecha called Meepon, then after knocking Ugraine out and using Hinata as a living battery, Vizzd pilots it to attack Ishruna. While Lucius and Shen evacuate the civilians, Schwartz is forced to fight Meepon alone because Jinguuji was separated from Hinata for too long and lost his strength. When they realize Hinata is inside it, Jinguuji and Schwartz ride up to Meepon, but Jinguuji does not regain his strength. Suddenly, Hinata awakens and usurps control of Meepon from Vizzd. Still under the influence of the dark energy, she gloats that she is finally powerful, then declares her hatred and envy of Jinguuji and attempts to crush him. (Source: Wikipedia)