Randomly stumpled upon this post while browsing my libary. It's downright amazing.
May evil always be with you.

Besides that the games has a few play styles which is why my only evil action I'll possibly take with a grain a salt is Velvet as a mistress i agree, the others give solid boosts to all minions, but when it comes to Rose and Velvet... think of it as a ranger/stealth build vs a tank/bruiser build. Rose boosting blue and browns reinforces setting up a set of blue and brown for tanking to make immortal loops of front liners who just wont die, where as the red and green setup is for kiting into ambushes for bonus dps which is a lil jank thanks to greens not going for back stabs during kites with red making the boost more useful for only reds so i kinda prefer Rose a bit more as well i agree. (2 end)

The story and view of the 3rd Overlord kinda depends on the route you take which equates the sins with his personal 2 being wrath (because mass genocide in a few ways and revenge) and pride (you own a personal army and conquered multiple places peacefully or by pure evil for the corruption route) so who would not have pride in that? (1)

I'd also argue that there's very little point in going the evil route since velvet offers an upgrade to the green and red minions, and the objective best combination of minions is the brown and blue.

I think when you get up to 50, I did something around 30 brown and 20 blue. Rose is the way to go tbh

Your character arc is actually being given the opportunity to commit each sin yourself.

Jcookster is on point.

some descriptions are hard to read. run-on sentences and the like.....

Hey Jcookster, you are almost there but not quite.
1. Gluttony is correct.
2. Lust is correct.
3. Sloth involves the Overlord stumbling upon a grove and he is requested by some ghastly elves to rid it of unicorns. You can choose the easy route (sloth) to burn the grass in the grove thus killing the unicorns and destroying the grove, or you can fight them like normal and make your escape with the totems.
4. Greed is correct.
5. Envy is correct.
6. Wrath is represented by the villagers asking for your forgiveness after Khan raids the town. Killing them in your fury represents this sin.
7. Pride, represented by the second overlord, has no specific event tied to it. It is instead represented by the culmination of all the prior sins, just as the second overlord himself is the source of the prior sins on the fallen heroes as well.

It may be a slight stretch, but I believe that the 3rd Overlord is a representation of all 7 deadly sins combined (That is if you are 100% corrupt). This is because:

1. Gluttony (You chose to feed your minions over the starving peasants)
2. Lust (You chose the more lustful sister Velvet over Rose)
3 & 4. Sloth and Greed (You couldn't be bothered to save the Elven race by rescuing their females and instead decided to take Goldo's gold)
5. Envy (You decided to steal the Mother Goddess statue instead of returning it to the Elves)
6 & 7. Wrath and Pride (Having been betrayed by all involved, you take out your anger on the second Overlord by killing him and thus priding yourself as the new ultimate Overlord ruler)

If the 3rd Overlord chooses not to be corrupt (0%), then it could be said that the overlord is overcoming most of these sins, e.g. leaving the food for the starving peasants. However the wrath and pride part is hard to justify...

There is but one glaring typo I found, at Jewels text where you said she "steel" whatever she could. It is "steal", if you mean to say theft, "steel" is the metal. Otherwise nice story bro!

Great post but I think the Overlord has the sin of pride only if you go for the evil ending.