Lero Osyaza

==Summary==
Lero Osyaza is the Demon Lord and protagonist of the light novel The Demon Lord Won’t Admit Defeat!.
After being officially elected the best Demon Lord of all times; having lived through countless generations of heroes, his reputation took a huge blow when it was revealed that the humans sent a hero from another world, who arrived so powerful he already surpassed every being in the universe.
However, their final showdown couldn’t reach a conclusion; while the hero possesses the ultimate power, the Demon Lord had the ultimate defense! This marked the start of a one-sided war, that is, the beginning of an Overlord’s failing plans against the most determined of all heroes.
==Powers and Stats==
Tier: 
Name: Lero Osyaza
Origin: The Demon Lord Won’t Admit Defeat!
Gender: Male
Age: Unknown (lived through several generations of heroes)
Classification: Demon Lord, Overlord
Powers and Abilities: 
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|-|By himself=
Superhuman Physical Characteristics, Longevity (Lived for several generations of heroes since “immemorial times”), Magic, Fire Manipulation (Learned the Fireball spell, which is based on his own power), Danmaku (Can summon enough fireballs to cover an entire war field), Time Travel, BFR (Both his procrastination and retroaction abilities allows him to respectively send his attacks in the future and the past. In addition to this, he can send others objects, beings and effects to the future.), Resurrection, Immortality (Type 4) (Can put someone’s death “back to later” to resurrect them, a process which automatically apply during his own), limited Damage Transferal (Can put the effects of a blow back to later, making it so he only needs to bear them at a later time), Causality Manipulation (Can put a specific effect to later without affecting the cause or removing the others effects, such as removing a drawback and only keeping the good sides of an object), Acausality (Type 1. Isn’t affected by his own changes to the past), limited Existence Erasure and Soul Manipulation (Can send others to the end of the world, a point in time where everything gets erased and eventually reincarnated), Resistance to Mind Manipulation (Overlords possess the "mind of a leader" and can easily shrug off any mental interferences, since their brain is that of an army)
|-|With items=
Power Mimicry (The turnabout mirror allows its user to make a perfect copy of anyone who gets reflected in, who’s only goal is to win over the original), Power Nullification (The chains of banality completely negate the activation of one's powers by directly blocking their power source), Corrosion Inducement, Regeneration Negation (Up to low godly. Anything hit by the Sword of Decay will have their body rot away, preventing even regeneration from the soul, since the production of matter is slower than its destruction), Memory Manipulation, Perception Manipulation, limited Biological Manipulation (With the Oblivion Pendant, Lero enters in a state of "mental non-existence", where he is forgotten by everyone, becomes completely undetected by their senses, and his attacks don't trigger the natural defensive mechanism of a target's body), Power Modification, Law Manipulation and Resistance to it and BFR (The World Anchor allows him to stay under the same timeline and rules, while forcibly rewriting any "system" following different laws)
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Attack Potency: Wall level (Broke all the bones of the First Hero with a punch)
Speed: Subsonic (Moves so fast that bystanders thought he was invisible)
Lifting Strength: Unknown
Striking Strength: Wall level
Durability: Wall level, Procrastination makes him hard to kill
Stamina: Superhuman (Even without his Procrastination, it was stated that even undeads trying to follow his daily routine ended up tired, despite being constantly stated to be able to work a full year non-stop. His lack of high magic allows him to conserve his immense mana, allowing the use of thousand of fireballs per second)
Range: Standard Melee Range, Kilometers with Fireball, up to Universal with Procrastination and Retroaction (Both abilities are based on the target’s presence in the timeline, ignoring any problem of distance)
Standard Equipment: A variety of magical items (see P&A and below)
Intelligence: Lero is ranked as the most intelligent Overlord on his personal info, who won his place not by raw power, but thanks to various schemes, which went unnoticed for years. After realizing his inability to defeat the Last Hero, he's now bringing several plans a week, which were stated to be able to even bring down even an army of the mightiest giant, if not for the "hero intuition"
Weaknesses: While Lero's powers are amazing in terms of defensive abilities, he lacks actual offensive ones by himself, and needs to rely on magical items. His retroaction only works in the timeline he's in. The Turnabout Mirror can be overcome by newly developed abilities or training. The Chains of Banality can't affect raw power and physical attributes. The Oblivion Pendant can't be turned off manually, and needs someone to utter the user's name.
Notable Attacks/Techniques:
Procrastination: The ultimate defensive power, owned by the Demon Lord. It allows him to “put back to later” anything, sending them or their effects to thefuture. In addition to this, by putting his or someone’s death to later, he can resurrect a target. 
The farthest point in time he can send something to is the end of the world, where all is erased and eventually reincarnated under another lifeform at the very beginning of the universe, although those with a particularly strong willpower will just be reborn the same way.
Retroaction: The (former) ultimate offensive power, owned by the Demon Lord. It allows him to attack the past version of someone, and make the changes in the past directly affect the present. Using this, the demon lord could beat anyone he faced even if he was significantly weaker than them, due to being able to attack them in the past when they were weaker or to make them lose energy or abilities by making easy battles way more difficult. It leads others demons to believe that his only spell, Fireball, was as strong as the one witches possess, despite only being a level 1 spell.
This ability is however restricted to the timeline the user is in, making it useless against beings from another world, who already arrived stronger than the Demon Lord.
Fireball: A legendary spell owned by witches, stated to be able to turn the entire world to ashes. The mage’s version is only a failed attempt to reproduce them, and it is the one learned by the Demon Lord. Despite his version being believed to be a level 9 spell, it actually is a mere level 1, which is the same as “punching someone, but with more range”. Because of the ridiculous difference between its firepower and the magic reserves unique to demons; it can be spammed enough time to fill the sky with fireballs and cover an entire war field.
Magical items: A lot of items were bought or stolen thanks to the treasures accumulated over the years , being all used in the hope of defeating the Last Hero; the following are:
*Turnabout Mirror: A mirror that allows its user to make a perfect copy of anyone who gets reflected in, with the copy's only goal being to win over the original. Since it only copies the target in the state they were when reflected, the copy can easily lose if the original were to train or develop new abilities.
*Chains of banality: Special chains which prevent anyone or anything they touch from releasing their powers, by directly blocking their energy source. However it can't do anything against physical attributes and sheer strength.
*Sword of Decay: A sword that slowly decades itself, as well as anything it touches, preventing regeneration. Its true strength lies in the fact that by decaying, it spreads into the air itself, making its contact near-unavoidable and faster by multiplying the contacts with its particles.
*Oblivion pendant: A pendant which makes everyone forget about the user's very existence, to the point where they can't detect them through their senses nor react to anything they do, even if they are being hurt. The state the user is in has been referred to as a "mental non-existence".
*World Anchor: An anchor's piercing, located in Lero's left ear. Its power is to always ensure that he stays in the same timeline and under all of its rules. In addition to this, it can also forcibly rewrite someone's "system" with the timeline's one, preventing contradictions regarding energy conservation or changes to the laws of the universe.
==Notable Matchups==
Victories:
Losses:
Inconclusive:
Category:Characters
Category:The Demon Lord Won’t Admit Defeat
Category:BFR Users
Category:Causality Users
Category:Fire Users
Category:Light Novel Characters
Category:Male Characters
Category:Memory Users
Category:Power Mimicry Users
Category:Power Nullification Users
Category:Resurrection Users
Category:Time Travelers