Jin nodded to Erza, who wanted to study healing magic and plant magic.

"Do what you want to do."

"Thank you, Brother Jin."

"I hope you'll take a look at the vegetation in Hale, too."

"I'd like to take Lorona there with me, then."

"Oh, ......"

<. She is the mother of Theon and Istaris, and is the leading botanical and agricultural researcher in the Nordic Federation.

Unfortunately, however, she is not a member of the .

"If you saw Erza now, you'd be surprised for sure."

"......"

I've known her for 400 years, so I don't know what would happen if I saw her now, since I knew Erza when she was young.

"In such a case, we should create a <> (......)."

He thought that this way, Reinhardt and the others would be able to see the faces of their offspring.

"I'll make a female form and a male form. Erza, will you help us?"

"Well, if that's what you mean, I'd love to.

So Jin and Erza went to the workshop.

They decide to call a "craftsman (Smith)>>" to help them with the heavy work. She is not Reiko, but a mini-Reiko.

She is a mini-Reiko, not Reiko. She is to carry mainly heavy metal materials.

When the materials were ready, Jin started the process slowly.

For the time being, four female and two male dolls are made at the same time.

Jin finished the skeleton, muscles, nerves, sensory organs, auxiliary control core (control core), and internal armor one after another.

The tuning of the body was done with a particular emphasis on magic-related abilities.

Erza added skin and hair to the body.

Finally, after consulting with Jin, she made it possible to change the body shape and face in the same way as the <>.

"Is this okay?"

"Hmm. I tried not to look like the other members of the family.

The skin color is slightly dark. Since most of them are fair-skinned, this is a distinguishing feature.

Also, the hair color and eye color are the usual light brown.

"This is good."

"Yes, I'm satisfied."

Jin and Erza were satisfied with the result.

These can be controlled by the old man or from the cockpit in the laboratory.

Jin hoped that Erza would be able to use them and visit the Nordic Federation with him in the near future.

* * * * * * * * * * * *

"By the way, what is Saki researching?"

<

.

"Biomaterials?"

"Heh."

The shell of the Gigantopod is the strongest material except for the dragon type.

Jin was curious to know what they were going to do with it.

"Thanks for the tea."

He finished his tea and put down the cup,

"I'm going to check on Saki.

Jin told Erza that he was going to check on Saki,

"Well, go on."

He put the mini Reiko on his shoulder and started walking toward Saki's house.

Since the house had been moved, Saki seemed to be doing some things in the laboratory in her house, not in the laboratory.

"Saki, are you there?"

Jin came into Saki's laboratory and casually called out to her in his usual tone.

"Hey, Jin."

Saki was conducting some kind of research with Smith99 as his assistant.

"I heard that you are working on biological materials.

When Jin asked this, Saki leaned forward as if she had just heard what he wanted.

"Yes, that's right. Here, look at this.

Saki showed us a fragment of the shell of a Gigantopod.

"The shell of a Gigantopod is weaker than the leather of an ancient dragon, but it is a material with various unusual properties.

It is strange to say that ...... before he was born, but 400......35 I didn't do enough research on it 400 years ago," Saki said.

"Just as well, I'd like to hear Jin's opinion too."

Saki, who had completely stopped working, offered Jin a chair and sat down again.

"About 350 years ago, I was studying how the shell of a gigantopod could be so strong. The conclusion I came to at the time was that it was made by layering the tissue and channeling magic power between the layers to improve the effect of the reinforcement.

"I see."

Saki said, "As a result, the magical power strengthened it remarkably and it became so strong.

"Of course, that's not all. The surface gloss and reflectivity also reflect physical magic.

Even laser beams are largely repelled.

"It's a different kind of strength than the leather of the ancient dragons."

"That's true."

<

But the shell of a gigantopod becomes extraordinarily hard.

"To return to the story, if you remove the magic power between the layers, you see?

Saki peeled off a thin piece of the shell in her hand and showed it to me.

"This is a sample with the magic completely removed, but you can peel it off by hand like this. It looks like mica, doesn't it?"

"Oh, this is ......."

Jin was impressed.

As a side note, this information is actually known to Jin's original (400-year-old Jin). The original Jin (400 years ago) knows this information, but the duplicate Jin does not.

Saki is aware of this, which is why she is explaining in this way.

"I have concluded that by strengthening the magic in layers in this way, it has a great resistance against vertical forces.

"I see, that makes sense."

The secret of the hardness of the shell of the gigantopods has been revealed.

Jin was reminded of , which is used in modern Japan.

FRP is a composite material in which tough (mainly high tensile strength) fibers such as glass fiber and carbon fiber are inserted into plastic to increase its strength.

Plastics have a low elastic modulus and low resistance to deformation. This composite material was developed to improve this situation.

Jin thought that materials strengthened by magic power might be similar to this.

And there are two ways of compositing with such fiber materials.

One is to evenly sprinkle finely cut fibers. The strength of the resulting material is not directional.

The other is to infiltrate the plastic with directional fibers, which significantly increases the tensile strength in the direction of the fibers, but weakens the tensile strength at right angles to the fibers.

The shell of the gigantopod reminded Jin of this.

"I want to find an effective way to process and use this interesting biomaterial, that is, the shell of the gigantopod."

As it is, only a limited number of technicians can process the material.

And if the shell is processed in such a way that it can be processed by ordinary technicians, the strength of the shell will be reduced.

"Hmmm, I see. ......I see what you mean. ......"

Jin thought about this problem for a while.