She decides her s*ave half-elf is not so bad and decides she'll take full responsibility of him, but she also keeps him around because he is a s*ave and considers him a pet, and mostly to be reassured that he will not ever betray her because of both the s*ave mark and his feelings towards Mamori.

If you made enemies in your previous world and then were isekai’d into a dungeon situation, only to realise that you were considered one of the conquerable enemies of humanity even though you just wanted to be left alone... why would you ever provide mercy to anyone who could tell of your location? And you aren’t their former classmate who could provide a second chance at humanity and friendship - you’re now considered training fodder, so why wouldn’t you squash your fellow isekai’d classmates like ants while they’re thankfully still weak?

in the end, she finally find a sanctuary for her broken heart; her half-elf s*ave, who become her loyal subordinate until the end

Thwack!

His head fell in front of them.

"Dangerous!"

"Guhaaaaaaaaaaaa?!"

"You guys?!"

"Everyone?!"

They tried to resist, but were too weak. Blood spattered on the monster as it crushed them.

When only one was left alive I controlled the monster to step on his head, which exploded.

I recycled the corpses.

She was captured by goblins and fell into the hell of this world.

"No! No! No!! Nooooo!"

She was stripped of her clothes and violated by the goblins in turn while screaming.

The village women died quickly, but the female swordsman couldn't die easily and suffered. Had she given birth to about 10 of them already?

The MC hates their classmates but you don't have any backstory on why she hates them directly. Like she was bullied by the girls and loved by the boys, but maybe it could written like an average day for her in that environment. Tid bits like that seems to me give more detail and expression to the characters.

Another example I will give is that the first slayying of monster of the hero is important so you know like this is how the hero feels. You have a side-character that gives exposure for monster slaying but it seems more like looking through a window you know something is happening but you don't feel any connection to it. It's outside of your control and nothing will change.

I need to start with that if the MC doesn't use the dungeon that much, which in principle is fine. But in the description, it states, "She made a resolve. She would create an impregnable labyrinth where no one could trample on her anymore, and perfect her reclusive lifestyle there.". So I thought she would grow the dungeon more in between the chapters, but until the last moment of the novel, she has in total around 4 dungeon rooms, with 2 being boss rooms and another 2 being regular rooms.

After the Demon Lord comes to the MC, the entire point of the dungeon is almost thrown away. The dungeon doesn't grow, and she doesn't use much of the dungeon functionality, like making more helpers. At one moment, she had around 1 million points. Nowhere does it state or give an indication where these dungeon points whent to. Possibly the armor of the living mail and health, but still, can't she get better monsters?

The ending with the elf s*ave seems like something went wrong somewhere. The MC distrusts humans, and with this s*ave being half-human and half-elf, it would seem better. But with her ending up with the s*ave and being so nice to it and undefensive towards it, it strikes me in the wrong way.

but a single character that's subordinate, but not a lover,