[X] You must prepare for your fight with Itsuki. You must train your spiritual energy and martial arts.
You needed strength. All the political and economic power in the world would be worthless if you couldn't hold onto it with your own two hands... So you'll train yourself to become stronger, it's just that simple. So you walked towards the inn you were staying at to meet with William once more. You briefly stopped at your own room to change back into your combat outfit, you didn't want to ruin the Prince one so soon, before arriving at William's door. You didn't hesitate knocking, you were already sure that now was the time for action. Eventually, William opened his door.
"Yukihime, I thought it would be best to let you recover after what the demon must have shown you." You suppress a flinch at the reminder, "I have finished... 'Recovering'. I want to continue." You put every ounce of conviction you had into your voice. "You're still willing to continue? Why... For all you know I'm going to subject you to something horrific again." William was stoic, but something told you, your answer would be very important... You smile a bit empty "...I hate the world. That was one of my first thoughts after my father was killed like a dog! Life has given me plenty of more reasons to despise it. I hated living in a world of bone and ash, living off scraps of a long bygone era... Then I was summoned here, and I realized I hated this one too... I hate the system of slavery here, to the point I avoid it at any cost to avoid cutting down a slave owner. I hate the discrimination I've faced since I've been summoned... I hate how the world is slowly ending... I want to change it! The world... It doesn't need to be this way, if I could be strong enough... If I could be powerful enough to make the world better, to change the hearts of the people! If I could save the world... Then it doesn't matter how much it hurts. I'll tell you what I said to the dream demon! It doesn't matter if you show me that a million times! It doesn't matter if you subject to me something a million times worse! I'd do it all the same anyway!"
You were huffing a bit after your impromptu speech... William was quiet for a long time until you hear clapping from him "Good answer. Seeking power for the sake of power is meaningless... It should never be the ends to the means itself. It must always be something you acquire on your road towards your goal... Or at least that's what I think of course. We'll begin your training immediately as you wish." William led you out towards the forest... "We're heading out this way so we can work without interruption. There is very few suitable spots inside the city." William explained this to you on the way... Eventually you both go silent, not really willing to go into small talk. Soon enough you and William find and clear a suitable clearing in the forest of balloons giving you ten to sell later.
William looked at you his eyes flashing a blue color before nodding to himself, "It seems that your energy has calmed from being forcibly released earlier. You have an impressive amount that I didn't expect, but I can work with this... For right now I'll teach you a basic technique, this doesn't require any special training and will assist you more than most even if it doesn't seem like it. Many people instinctively grasp this technique so I have no doubt that you will get it quickly. This is a simple energy detection ability, it'll allow you to sense your own energy and most importantly... The energy of people nearby. Firstly, you must go into a meditative state. Once you achieve that, you must actively search for your energy, due to having so much of it this should be very simple. Finally, you must push that energy out like an expanding dome from you... As a caution you must NOT attempt to push your emotions into the energy and must remain calm. Do this and you will have learned the technique and we will spend time drilling it into you so that it's instinctual so you can always sense your own energy." You nodded, listening attentively.
Setting yourself down, you begin to attempt to enter a meditative state. It takes a long while, but you're not unused to meditation. Once you were almost entirely sure you were deep enough, you attempted to search for your energy... You found it almost immediately at the edge of your Awareness. You prod it a little, it reacting sorta like slime before continuing onto your task. You try suppressing your emotions and you're successful, another familiar task. Finally you 'grabbed' the energy and 'expanded it' all around you. Immediately you start detecting the grass under your feet, the trees around you, and William watching over you in 360 degree 'vision'... Except that the vision is completely colorless and missing many things you know were there like branches, stumps, rocks and such... Things that weren't alive, you couldn't detect. You open your eyes after cutting off the technique by 'cutting' the stream of energy coming out of your body.
"Well done Yukihime! What did you see?" William looked very proud, you didn't really understand it if it was so simple. "I saw the world without color, everything that was alive in around a... Twenty foot range? I think I could go beyond that if I put more energy into it but I didn't see the point in testing my limits the first time using this power." You were pretty happy you managed to do it. "Every... Everything that's alive? Yukihime do you mean you see the grass? You see the trees? You see it all clearly?" William looked a bit off balance at that and you didn't really understand, was he testing you? "Yes, the world was the same, aside from the lack of color and the things I cannot detect like... Rocks and dead plants... Shit like that."
William sat down. "Yukihime... This technique is only supposed to sense people. I have been able to use it in a similar function but its blurred, unfocused... Truly you are something special." Oh, so you weren't supposed to do that. Huh. "Well... Yukihime, lets get started drilling this into you... I'll be watching... After a while I will be deliberately breaking your concentration and then we will see if you can use it in a fight."
So for the next few hours that's what you did. You sat, kept doing the sensory technique over and over. Occasionally hit by a rock, or a stick, or the flat of William's staff before you were able to do it instantly and feel your energy (of which you had a large amount, not as much as William but around half) outside of actively holding the technique. Before William could strike you again which was more annoying than painful, you blocked it ready to fight.
You launched yourself towards William, who blocked redirected your fist with his staff. He sent a palm strike at your abdomen, only for you to slap that aside... Only to get kicked in the face and sent to the ground, where you recovered with a roll. William vanished, and you activated your new technique flawlessly intercepting the now colorless William staff with your hand before it could smack you in the face. Ripping him closer so you could punch him, only for him to let go of the staff and deliver a strike to your chest. You stumbled back a bit, and William took advantage of that vanishing again. You used your technique to attempt to locate him, only to find yourself unable. You were confused for a moment, before deciding on a whim to include underneath you in your 'bubble' of detection only to watch as William ascended from the ground to deliver a punch. You were sent sprawling, but had enough sense to fall into a position to recover from.
This continued for some time, with you losing badly and learning how to defend against a multitude of attacks from hidden opponents. Basically you got your ass beat while learning to detect the invisible man.
So you know how your Awareness skill is like, max. Yeah, you blew this shit out of the water and would have accidentally unlocked your spiritual energy anyway, this is just streamlining it and making sure you didn't hurt yourself. Uh for example, the longer that you were in the First Lesson 'Dream Arc' the longer your Awareness skill was bringing out your spiritual senses which allowed you to stop seeing Saki, and start seeing the demon you wanted to kill. Also hey your war veteran status actually came into save your ass by the way, learning to suppress your emotions saved you from fucking yourself over with your emotions.
William wants to teach you something else.
[X] Martial Arts. "No, Yukihime I'm not going to teach you martial arts via 'kicking your ass', I'm going to teach you some moves that will go well with your own style, and correct some weaknesses I've spotted."
[X] More Spiritual Energy Techniques. "Now that you can sense your own energy I suppose I can teach you something... Yes I suppose this will be alright." You must choose one of the following for this option.
-[X] Iron Body Technique. The best offense is a good defense.
-[X] Wrathful Giant. You will crush them like a bug.
-[X] The Third Eye. No lie will escape your sight.
-[X] Ash and Bone. For everything will return to nothing.
-[X] Healing Touch. To be able to heal others, but not yourself.