Demonic New Life

A flash at the moment. Everything changed. Suddenly you see in your vision sudden images of monster, creatures of myths tearing, killing, eating, consuming, and many more things to the humans; other images where you're in the middle of Nothingness, while some imposing figures were watching you over; other images where you could see a mob of souls, there, standing, waiting for their turn of judgement. You felt that you were in any of these situations, but your brain was too overwhelmed with these strange images that your body felt really heavy, Whatever it is, it was hard enough to make you question reality and check around to be sure of your situation.
Tokyo(Mainline):You woke up. Looks like it was a bad dream, You stand up and go prepare yourself for your normal routine.
 Velvet Room(Persona):Now you are in an inconceivable world. There are 2 strange persons in the center. The apparent leader of this place talks, "Welcome to the Velvet room, My friend."
Even if you believe what you saw wasn't real or some trickery of the brain filled by either stress or whatever crazy theory that stuck into you, Something around you was changing
DSP: a strange program called "Demon summoning Program" Appeared in your most important device. You don't know how it got here or why it got here, but it's clear it has some unique function that you are still not aware about. You have been trying to eliminate it a bunch of times due to the high chance its a malware.
Persona: something in the back of your mind has been speaking to you, whatever it is it's clear that it doesn't want to hurt you, Or give you problems. That voice also implied how there is more that may or may not come to your aid. You proceeded to call a therapist to talk about whatever might be happening to your brain.
Demonic Self: You feel..... weird, You don't know how, but somehow you now feel your body being stronger, Your mind becoming clearer, Many benefits in your body that came suddenly and with no warning, you think you should go seek a doctor whenever you have free time.
You kept going with your normal day still. Whatever happened is not something to be worried about, or you though so until
Apocalypse:You could see the news,  Everyone panicked, everyone running, Monsters filling the Sky. The reporter did his job before the cameraman left the scene, and you could see the reporter being tackled by a Demon, cutting off the connection right before the first blow happened.
Enjoy your new life
New Vision: You appear suddenly in another place. Similar to reality and yet twisted in order to exacerbate whatever it wanted. Nothing made sense, neither the residents that you came across with.
Appreciate your mind opening up.
Crumbling world: Something appeared in front of you, Something that was neither human nor animal. You don't know how exactly you managed to either control, escape, or overcome your situation, but you became aware at that moment, you needed to prepare.
Now you have a new routine.
After getting into safety or some kind of downtime you proceeded to look for options, realizing that the strange situation might have something to do with it
Demon summoning program:You started checking that new app in your device, Learning its functions
Persona:You closed your eyes focusing on searching for that voice, when that didnt seemed to work you opened them and a Creature appeared in front of you, not showing any kind of hostility. "I am Thou, Thou art I" were their first words before somehow, the creature reached and implanted in your brain how they worked and its possibilities.
DemiFiend: You checked on your body, looked around it, and realized that something seriously wrong happened to you and yet, you feel at peace, in more control. More powerful.
No matter the method, Now you have the ability to Make contracts with the Demons, with these new creatures that are now around you, you feel magic flowing through you or your device and now know how to use it.
Now you can choose and unlock new functions of your powers if you desire so, even with some caveats
For the DSP:
One for all:Any perk you get will affect all of your demon companions in some shape or form
Except for you: Actually. The demons will get the buffs, Not you, you will still have your powers and the capability of using your Device, but you are overall weaker than any of your demons
Demonic Backup:One risk of having the power in a machine is how machines can simply, Break. With this you get a cloud storage that cannot be interrupted, Modified, or changed in any form that allows you to recall the DSP and install in any kind of device you want. The Device with the DSP also gets a good Boost in protection and longevity by simply having the program in.
Obvious Target: Any enemy you encounter will be aware of what is the device that houses the DSP and where it is in your body. Make sure you don't get hit
Ars Goetia: If a demon reaches their peak of their natural growth, they can teach you their skills and magic, no special requirements
What?:The DSP doesnt translate what other demons say unless you had the data of that demon before hand,You need another demon from your party or some outside party to translate what they say.
For the Persona user:
Army of two:Normally You would only be able to channel the power of the demon/Persona you have access to, But with this perk now they get a Physical form, get a power boost to be at least as strong as 2 demons, and you can still Use their magic (Or use other demons power if you choose to do so) with no penalties or loss of power
Shared life: Now if either You, or your demon faints or gets KO, the other gets KO, keep an eye on your demon as they will keep an eye on you, and get some healing spells
2 souls, one body: You know get the ability to "fuse" with a demon at will. Getting some of their physical characteristics alongside a overall powerboost, Similar to Either Fate Prisma/Sakura card captor getting the powers of defeated enemies or an "install" in fighting games, getting part of the demon in your body until you no longer want to channel it.
Only along for the ride: Actually, the demon gets in control of your body, They will still seek for your survival and will not attack Allies, but they might do something you either disapprove, or gives you more problems in the future. You can keep the control if you fuse with your Original/Starting demon.
Linked:Once you reach a certain trust, familiarity or friendship with someone else, you can manifest a demon as a simbol of your social link, the stronger the bond, the stronger the demon, it doesnt occupy a slot in your party, but it cannot be modified in any way, and if your bond is broken or dies you lose the demon
Cherish your friends
Bad Omen:Something in you gives bad vibes to everyone around you unless you have met each other enough to disipate that aura, Its harder for you to get demons or friends.
For the Demi fiend way:
Devil trigger:Tap into your inner demon and let it out. You can For a limited amount of time (That can be extended by simple usage) fully transform into a Demon, withouth losing your reason and with Way more power
No control: Lose your consciousness. You are now moved by instinct, Even if you may not attack your allies directly this will not stop you fro doing something dangerous or using your Allies in ways that may harm them
All for one: You can consume your demon companions, losing them in exchange to learn new Spells and skills. This perk also allows you to use your allies in the field as Safety measures. Any hit that may kill you will be transferred to any of the demons on the field.
Bad Reputation:Whenever you consume a Demon, the word spreads quickly. You will have a harder time making contracts with Demons the normal way for the inherent possibility they might become their next meal. Its not unlikely they may try to do the same to you if you choose certain drawbacks.
Apex Predator:You have a hint or an idea to what your opponents are weak to, also you have a plain damage Buff
Reckless: Your defenses are bad, Criticals and damage to your weaknesses is amplified x2, Dont get hit.
(Later i plan to add drawbacks to said perks in order to get back Some of the points that you can invest it to use it on more things)
Now we will talk about damage types.
Damage types and Weaknesses
There is 8 damage types, Melee, Gun, Fire(agi), Ice(bufu), Electric(Zio) Force/Wind(zan), Darkness(Mudo) and Light(Hama). You will get a free defense to one damage type alongside Defense against Light. If you so desire, you can change your Light defense to other element, but be warned, the magic of darkness and light is known for the possibility of getting you instantly killed if it hits, and you dont have protection against it... your defenses can also change depending on what is your equipment or armor.
On top of defense, there is also different "tiers" of defense, Tier 1 is "Resist", receiving less damage from this damage source, Tier 2 is "Nullify", No receiving any sort of damage from that damage source, and Tier 3, which can be separated between "Reflect", automatically that damage type bouncing back to hit your enemy and "Absorb", getting HEALED or buffed in some way if you actually get hit by said attack directly, Dont rely on this too much though, there are ways to bypass this kind of defense if you have certain skills... There is also another damage type: Almighty(Megido), which is true damage that cannot be mitigated in any way, but has a really steep cost that doesnt allow you to use this kind of magic willy nilly.