"Anyway, I'm sure we'll find out a lot more in a few days. Then we'll be busy."
Until then, we'll be ready," Jin said.
"It's Vee's birthday today, isn't it?"
Stearina patted Vivian on the shoulder.
"Yes, yes. Let's not talk about the hard stuff, now let's have some fun.
Toa says in a cheerful voice.
"Yes, we are.
"Yes, yes."
"Yes, yes."
Everyone agrees, but it is inevitable that a small thorn named worry remains in the corner of their hearts.
* * * * * * * * * * * * * * * *
After everyone returned to their respective countries and homes, they went to Horai Island.
Erza, accompanied by Edgar and Meene, went to Shoro with Mr. and Mrs. Reinhardt to go back to their hometown. Jin is alone with Reiko for the first time in a while.
"Well, really, where should we start?
In the control room, Jin folded his arms and pondered.
"I guess we should start with the emergency mana tank.
Jin put his thoughts together, "Not only for mermaids, but it should be usable for other golems as well.
"Can't we make it so that it can store more mana than before?
This is an area that has not been fully researched due to the fact that it is an old technology.
"In short, it would be good if we could compress mana. ......
"Didn't your father's world have a similar technology?"
Reiko offered her advice, which was rare. Jin is happy to know that this is another development of his ego. And then.
"Wait, ...... that's right, <>!"
Jin is not good at chemistry, but he has a broad, though not deep, knowledge of metallurgy.
One of them is called <>.
"I remember it was something about taking hydrogen in a gaseous state and putting it into the crystal structure.
I don't have the exact knowledge, and my memory is a little fuzzy, but that's all right now. It's the idea that counts.
"The mana that is stored in the mana tank is probably also stored in the gaps of the crystalline structure ......."
Jin's thoughts continue to wander.
"Then, what do you call the opposite of ...... tightness than a tight-lattice crystal structure? ......Well, you can try to prepare and experiment with a mana tank with a structure that is not tight-lattice."
Muttering to himself, Jin has settled on a rough policy.
"Reiko, old man, do you have any magi-crystals that are not tight in crystalline structure?"
"I guess so.
This is something I had not expected.
"Hmmm, what kind of material other than Magi Crystals (Magi Crystals) can be used to store Magi Elements (Mana)? ......"
I can think of various materials that can store free magic element (ether), but when it comes to magic element (mana) ....... Jin.
Generally, mana can be used only by the magician who created it from free magic element (ether), but exceptionally, the lowest <> or <> mana has <>.
If we compare it to real energy, it would be something like static electricity, or direct current electricity.
It is difficult to use it as it is, so it must be converted into alternating current, and then into kinetic or thermal energy to be used.
Since magic is to be used directly from free magic element (ether) by converting it into desired energy form, it is easy to imagine that this two-step method is inefficient.
However.
This is not the case with the children created by Jin ...... Reiko and other automata (automata) and golems, since they have the same magic pattern as that of Jin.
Jin tried to remember the materials that could store neutral mana.
"...... ancient dragon's leather, huh?"
We know from Reiko's remodeling that the efficiency of using mana is extremely high.
This is because it contains a lot of mana and can efficiently utilize the power and energy that mana emits.