ENTRY NUMBER I:

It appears that we have discovered a new resource at our disposal. A human SOUL is something we knew contained immense amounts of power before, but the DETERMINATION [A trait only found in the SOULs of humans] stored in one appears to have direct correlation to their power to fight.
The souls of humans and monsters are excessively different. Humans have the ability to use the power of FIGHTing in a battle, striking down the strongest of foes with only a knife. Monsters, however, have the ability to use MAGIC, and MAGIC PATTERNS in a fight. While humans are clearly more powerful in that regard, monsters do carry the ability to absorb the SOULs of humans. This an insanely powerful edge, making any monster with a humans soul almost entirely unassailable, due to the amounts of DETERMINATION not being natural to a monsters physical being.
If only we could find access to this power...

The possibilities intrigue me beyond belief.

ENTRY NUMBER II:

We've done several calculations in relation to DETERMINATION and the human SOUL, and
1. It seems the amount of DETERMINATION we would need to shatter the barrier is equivalent to seven unbroken human SOULs.
2. It appears when a humans SOUL 'breaks' or 'shatters' they become a creature known as a HEARTLESS. If their SOUL had enough DETERMINATION, they would also produce what is known as a NOBODY. However, if that soul had an insane amount of DETERMINATION, they could resist death as a whole.

ENTRY NUMBER III:

We've discovered two more entities like HEARTLESS and NOBODIES that intrigue our interest.
The first is a species known as the UNVERSED, that appear when DETERMINATION is abused by the DARKNESS.
The second is called a DREAM EATER. They, opposing the UNVERSED, appear when DETERMINATION is used too much for the LIGHT. DREAM EATERS can be corrupted when the people who create them turn to DARKNESS. A DREAM EATER yet to be corrupted is known as a SPIRIT, while those who are are called NIGHTMARES.

ENTRY NUMBER IV:

We continued our research. We learned that monsters can gain DETERMINATION, should they feel enough drive. However, their bodies not knowing how to cope with this power causes symptoms like immense sweating, possible melting, hallucinations, coma, death, flashing eyes, and even possible knew abilities, such as foresight and supposed ESP.

ENTRY NUMBER V:

We finished our research on DETERMINATION today. We gained access to a few crucial pieces of knowledge.
1. DETERMINATION and the weapon known as a KEYBLADE are directly linked.
2. Similarly, we found an ancient myth about something known as 'KINGDOM HEARTS.' It's lore is frustratingly confusing, but includes the fact that seven SOULs would be required to complete it. If we can attain this 'KINGDOM HEARTS,' it could be our key to escaping the Underground.

ENTRY NUMBER VI:

Today King ASGORE made the claim that we would be collecting the souls of seven humans who fell beneath Mount Ebbot. This was a bad decision in my opinion, but I do understand that it was made out of heartache. He and his poor wife only recently had to deal with losing their two children in one night. I can only imagine what they must be going through.
Oh well.
I suppose he only said what he thought necessary to give them hope.

ENTRY NUMBER VII:

Queen TORIEL has now left ASGORE and her position as the Queen of the Underground. ASGORE no longer leaves his throne room, avoiding socialization as a depressed recluse. That poor man. I wonder how he's doing...?

ENTRY NUMBER VIII:

ASGORE has ordered a pupil for me to work with. Her name is ALPHYS. She seems nice enough...? She makes constant eye contact, and her voice is very clear. These are respectable traits in a scientist. She frequently hums during her work.

ENTRY NUMBER IX:

In addition to ALPHYS and I, the King told two boys he found abandoned in SNOWDIN to aid us as lab assistants. They are very young, and brothers at that. The older one is thirteen, and the younger is nine. The latter between the two of them is named PAPYRUS, while the former goes by SANS. These two intrigue my interest.
They are two skeletons. This race was assumed to have been eliminated entirely in the war between monsters and humans, besides myself. I was said to be the final survivor. Yet here today, I stand meeting two young people of my own extinct race? Atypical to say the least.
Also, ASGORE mentioned they just 'appeared' in SNOWDIN? That explains nothing. I'm very interested in their origins. How could I not be? I'm a man of science.

ENTRY NUMBER X:

I've been pondering the concept of NOBODIES, and at that, non-existence. What is it like, to not exist in this world, but to still be there...? I'm going to find out somehow. I don't know how, but I will.
Even if it means there's no going back.

ENTRY NUMBER XI:

SANS and PAPYRUS are very amusing in their antics, even if still mysterious. The other day I inquired about their origin, and the answers I got were, "ORANGES?" from PAPYRUS, and "we don't really remember. it's like we just appeared there. like we were only just born." from SANS, of course.
Peculiar, isn't it?
SANS and PAPYRUS both are very different for being brothers. SANS is relaxed and introverted, while PAPYRUS, on the other hand, is curious and excitable. SANS also seems to be the more knowledgeable of the two.
I've noticed that SANS doesn't care how much work we give him, but just does it, often very quickly. I once told him to get me a lab coat I forgot on the other side of the castle, and he left the room and came back in less than thirty seconds. However, PAPYRUS is not the most efficient worker, and often takes extended periods of time to complete simple tasks. His brother will always offer to help, but the young boy will take too much pride in himself to accept the charitable regard. Even if not quickly, PAPYRUS always finishes any job we give him, and the only time SANS ever seems to worry about anything is if we overwork his little brother.
They really do love one another. They even refer to one another by little nicknames. What was it SANS called him again? "THE GREAT PAPYRUS?"

ENTRY NUMBER XII:

I have captured a DUSK for my tests with NOTHINGNESS. The others remain unaware of this. It seems the chemical formula of NOTHINGNESS is similar to that of the magical fuels that run throughout the CORE. This raises the question to me... What if someone fell into those chemicals?
I'm itching with curiosity. I need to know NOTHING.

ENTRY NUMBER XIII:

The skeleton brothers intrigue me more and more by the day.
Today I found SANS sitting around in the lab. He was bouncing a rubber ball, and his right eye was glowing blue. He lifted the ball up and down repeatedly, with a force of telekinesis. This is most definitely an irregular ability for a skeleton. Once he realized I was apparent, he instantly dropped the ball and covered his eye. I want to bring it up, but every time I try, he averts the subject. Perhaps he's afraid I'll do some kind of experiment on him?
Actually, they've grown to be much like children to me. I doubt I should let myself get attached, but it's hard not to with them. They truly just want the best for everyone.

Also today, ALPHYS showed me a prototype for a robot she was making. She said it was named 'MEGATRON' after an anime.
That name's a work in progress.

ENTRY NUMBER XIV:

I have to find out new information about NOTHINGNESS. I'm too curious about the NOBODIES. Records say that there are some that are humanoid. I must learn more. I can't settle for this. I'm a genius. I am a man of science, and my curiosity is starving me. My intrigue is like a knife, slowly cutting deeper into my mind. I have an idea, but it gives risks. Nobody else knows about this. Everyone knows that sometimes, things must be sacrificed for the greater good of science.
The world is made of LIGHT and DARKNESS. You cannot have one without the other. However, NOTHINGNESS lies somewhere in between those two.

ENTRY NUMBER XV:

Today SANS told me something. He told me I was like the father he never had.
It was pitiful, knowing what I had to do next.

ENTRY NUMBER XVI:

I'm sorry everyone.
I have to thank you all.
For everything.
Thank you, ASGORE, for my life, my position, my hope.
Thank you, SANS, PAPYRUS, for my love, my family, my dreams.
Thank you, ALPHYS, for my drive, my fun, and my experience.
Thank you, all.
If this experiment fails

Then I'll see you anywhere else.

ENTRY NUMBER XVII:

DARK DARKER YET DARKER
THE DARKNESS KEEPS GROWING
THE SHADOWS CUTTING DEEPER
PHOTON READINGS NEGATIVE
THIS NEXT EXPERIMENT SEEMS VERY
VERY
INTERESTING

WHAT DO YOU TWO THINK?