They say the whole universe speaks Japanese, even the Ultramen from M78? Don't worry, our protagonist will make Chinese an interstellar language (being international is so last century). They say Ultraman fighting monsters has a certain philosophical quality to it? Heh heh, then wouldn't a female Ultraman fighting monsters have even more of a... **-watching vibe? (The Ultraman of the Celestial Empire is indeed so harmonious.) They say people are getting tired of Ultraman being so righteous and perfect? What about a yandere dark female warrior taming monster girls, then...? Heh heh heh, the image is too beautiful to imagine.
(A transformation novel, single protagonist, at most a little flirting. This work is full of love and justice, so please read patiently.)