I recommend going from route 1 because it links onto route 2 pretty nicely. :)

The next routes will be slower to release, and be in the order of popularity - Why? Because I will need to dreadfully return to society again.

Route 2

-XXX-

… you need a successor.

[-.-'] This is not the first time I've heard this... but for you to bring up such a thing...

Demiurge… have you decided to join the squabbling of the female NPCs, too?

Besides… how can I even breed?

I don't exactly have… you know… male bits…

Ahh... Just thinking about it makes me depressed.

Even if research on a "how to" for Ainz-sama progresses slowly, I would still recommend investing some resources in completing this task. In fact, I have already started gathering information for the viability.

[o.O?] When, how, what…?

I don't remember participating or starting anything…

I've been going around to systematically grading potential female Nazarick members.

Firstly, we ignore all non-original Nazarick residents. The chance of betrayal can run deep in the blood.

Secondly, I've graded the hips of female members being able to bear a child, and the success of them giving birth with low expenditure of resources.

Thirdly, the survival of the youngling or younglings is utmost importance, because we may very well be only given one chance.

Of course, this research project is currently a secret from everyone else.

[-.-] D… Demiurge… you are like the one kid in the back of the class, who unexpectedly sells crack.

From your reasoning…

Above all, the mother must be from Nazarick.

The baby must survive and be healthy.

To do this, a good potential mother for a normal pregnancy and delivery must be picked.

Restricting irreplaceable item usage is definitely a bonus.

Although it pains me to say this, but I think we should follow and learn some examples from humans. Being one of the most fragile and insignificant species, I was able to manipulate some maternal and infant outcomes by...

-XXX-

Ainz's concentration was disrupted from Lupusregina's voice.

"Waa… I spilt ink. Yuri, may I borrow your assignment?" asked Lupusregina nonchalantly.

"Lupus… You didn't do it, right?" Yuri asked with a cold stare. "So, you decide to spill some ink onto a blank page and come running to me."

"N… No."

"Your eyes aren't very convincing."

"B… but it's so hard… Please help me, Yuri-nee!" begged Lupus.

Yuri sighed and continued, "Fine. Come on. You are disturbing Ainz-sama here."

-XXX-

Umu.

Thank you, Yuri! I can continue reading in peace now.

Babies that are born with minimal interventions at the correct gestation are the healthiest. Both the mother and baby must remain in good condition post-delivery for optimal maternal-infant bonding, nurturing behaviour and feeding pattern to form. Mothers, who required external or hands-on assistance for the birth of the baby are more unlikely to satisfy the criteria.

To increase the possibility of a good delivery, the selected mother needs a good birthing pelvis. The four types of pelvis are android, anthropoid, gynaecoid and platypelloid. Gynaecoid is the best type of pelvis to give birth with. Statically speaking, the gynaecoid pelvis requires less and minimal interventions. I have found this from studying human skeletal remains, after Kyouhukou's servants have fed on the mother's fles…

-XXX-

"Awawa? If it isn't the master of the snack room, Kyou-kun. Fancy meeting you here!" Entoma greeted.

"Geh. It's the devourer. I mean… How do you do, lady Entoma?" Kyouhukou replied.

"You know… recently your servings have gotten a lot juicier and crunchier at the same time. Keep up the good work!"

"Th… Thank you for your praise. However, they are a consequence of Sir Demiurge. I think you should you should be thanking him instead."

"I wonder why Demiurge just doesn't ask me to do it. It saves a step."

"Excuse me for saying… but I think it's because your table manners aren't exactly the most elegant."

"Rude. I eat the bones and everything. Nothing is left behind or wasted."

"No. I think that's the problem."

-XXX-

Argh! I'm zoning out.

Focus. Focus!

After grading the original female residents of Nazarick based on fertility capabilities, childbearing capabilities, delivery capabilities, and childrearing capabilities, the list from best to worst is as follows:

-XXX-

"Waa…! Yuri-nee, you're too strict!"

"Stop running in the hallway! Get back here, Lupus!"

"Kyaa! K… K… Kyou…," stuttered Lupusregina.

"How do you do, Lady Lupusregina? Yuri, too," greeted Kyouhukou, giving a gentlemanly bow and tipping his crown.

"Awa… Hello," Entoma greeted.

"Afternoons, Kyouhukou, Entoma" replied Yuri. Yuri adjusted her glasses and studied Kyouhukou for a moment. "Lupus here is just having trouble with her letter."

"Oh? Perhaps, I can be of assistance?" suggested Kyouhukou, smoothly picking up the cue.

"K... Kyou... I don't think..."

"We would be delighted," Yuri accepted immediately. "It would be wonderful, if Kyou-sensei helps Lupus this time."

"No!" Lupusregina cried out and continued to beg, "Yuri-neesama! I'll write the letter properly this time! I promise!"

Yuri sighed and adjusted her glasses.

"Declined."

"No...!" Lupusregina howled in despair.

"Awa… Looking at Kyou-kun makes me hungry. Can I borrow one of your arms?"

"Allow me to graciously decline, as I don't know if I'll get that arm back to help Lady Lupus."

"Then I'll just take it by forc..."

Smack, smack, smack!

"So ruff*... My head..."

"My antenna..."

"Cut it out," demanded Yuri.

"My pronotum... Why me too?" asked Kyouhukou.

"Instinct," replied Yuri, and adjusted her glasses again. "Come on. Let's go."

Slowly the voices disappeared.

-XXX-

[ )-:K ] Haa…

Children...

I feel like I zoned out while looking through an important page.

Ainz-sama, I believe you will have foreseen the reasons to my request, but I will state them anyways so we are on the same page.

There are four reasons for its increasing importance.

[o.O!] Four!?

I can't even list one, apart from quelling the squabbles of the female NPCs.

1. Your territory is rapidly expanding, so we need more candidates to control the lands without our forces thinning out. Anything that has been stretched far enough is susceptible to breaking.

2. A wise choice for not selecting your own creation, Pandora's Actor, to succeed you, as it may cause some discord with the other guardians (Albedo in particular). Ainz-sama, you also do not seem to have the intention of placing him on the throne.

Ahem… Of… of course I have seen this coming through…

[-.-;] Who am I kidding…

3. Pardon my rudeness, but should something to happen to Ainz-sama, we would still have a leader to follow.

4. In conjunction to reason 2 and 3, it would prevent a breakout of civil war among ourselves, if Ainz-sama were to depart from us.

In conclusion, I believe that you should choose the top candidates from the list I have provided to avoid catastrophe.

Huh? List? What list?

Select what Ainz thinks next and proceed:

1. I'll delay Demiurge's suggestion by saying I'm busy preparing a celebration... (To Overlord: The Guardian's Plot written by PervySageChuck)

2. If I could still drink, I'd drink and forget about all this! (To Raiden Satoru written by Above. them .all)

3. The list is… as expected… I wonder if Albedo bribed him… Wait... What the…! No! Just no! (To route 4)

4. First name on the list is... Argh! My eyes! Bleach! Where is it!? (To route 5)

*pun pun pun :D