system
Given the following post, respond as if you're commenting on Reddit:
human
[Anime] How do I make sure that my ultra-violent mecha anime doesn't turn into a harem anime?

50 years ago, a bloodthirsty alien race attacked humanity's farthest space colony.

For the past half-century, brave young men and women have been defending humanity from these monsters in Earth's fleet of *Macrundam*, powerful robots intended for space warfare.

Protecting Earth and the Inner Colonies from the intergalactic menace is dangerous work, with a high body count.

Even worse, the aliens have sent down "Infiltrators", aliens who look human who attempt to destroy humankind from the inside.

Sounds like good, ultra-violent schlock, right?

Well, I'm a commander, and my newest team is completely made up of 7 attractive young women and one ridiculously average, clumsy young guy.

He has no discernible qualities to speak of (at best, he's inoffensive), and yet all of the girls seem to find him charming in some way.

It's clear what is happening: This action-packed space drama that I was hoping to join is in danger of becoming just another stupid harem anime. 

As the commander of this regiment, is there any way for me to put a stop to this and "railroad" the plot back to the original premise?

Also: Is there any way I can force character development onto this personality-less doofus and make him less of a chore to talk to?
gpt
You can't. Harem is the default state of the universe. All things revert back to harem. The second your protagonist is halfway competent, the opposite gender will pounce on them. This is true for either gender.

Your only solution is to keep killing off all potential suitors in increasingly gruesome and traumatic ways to ensure it doesn't happen.