Canon version UltSans, or Raziel, as a survivor has many perks and specializations that could serve as bonuses against the infected of the green flu, or how I liked it was named as KALIVIRUS-09[1].
He has a more beneficial immunity system, which grants him total immunity to deadly sides and effects of any virus and illness. But the KALIVIRUS-09 doesn't kill the host, just infects it and gives the symptoms, so for him would require much longer time before the symptoms appear.
Is already immune to viruses, but is not a perfect immunity as can sound.
He would use shotguns as the AA12, a Glock or a Beretta or a 1911 as secondary, and any sharp melee as a pocket knife or a machete or hand axe as a tertiary weapon. Doesn't like Subfusils, dessert eagles, snipers as the awp,and the semi-automatic fire option as prefers manual and auto. Likes light and heavy machine guns, fusils and assault rifles as the M16 or AK47.
In story, he won't use what he doesn't like. In game, this becomes that he simply can't use what he doesn't like, but gets benefits in what he likes:
- +10% pistol dmg, to a max of +30% by mastery.
- +30% assault rifle dmg, to a max of +50% by mastery.
- +50% machine gun dmg, to a max of +70% by mastery.
- +70% shotgun dmg, to a max of +120% by mastery.
- +100% sharp melee dmg, to a max of +150% by mastery along extra stamina and reflexes using the melee what makes him capable of using it faster and better.
- Almost aalways headshot if aims and shoots manual, and very likely to headshot if shots without aiming but manual and is close enough.
By his boosted regeneration, he would recover his HP very quickly in slow motion but constant until suddenly heals completely, as this is very helpful for stop bleedings and heal any internal damage or injury without problem, while the outside and visual injury remains there and will heal very slowly as slower than average.
By his highly boosted physical strength in defense, his base HP is increased by 100, giving him 200 HP in comparison to the 100 HP any survivor has in L4D and L4D2. And has capacity to have Armor Health Points to have extra HP that protects him and makes him take less dmg until his AHP is gone what is his armor or protection breaks. He can replenish his AHP by searching in the corpses of military soldiers to find military protection, inside police vehicles, and inside military vehicles.
His perks against the infected are:
- The Smoker takes slightly more time to unable him until an extra second before he can't move, is only until but not exactly an entire extra second. This happens as when the Smoker's tongue starts grabbing him, he gives his weight from his muscles and makes his legs prepared to hold, which makes the Smoker struggle slightly more than should, but slowly starts winning until he loses his grip of the ground and gets pushed by the tongue and needs help of other survivors.
- He also automatically cuts the Smoker's tongue if is holding a melee weapon, or quickly grabs it if has one. Only works if he can move his hands.
- Is immune to the Jokey, as when a Jokey tries to get him, he twitches his body's direction to where the Jokey is trying to take him, and then move forward and down his head, making the Jokey fall forward as he also pushes it to fall. This is only capable exactly at when the Jokey jumps onto him.
- Has a move to can get the Hunter off of him, as either holding it's wraists to hold it until can't anymore or someone helps him.
- Has a move to prevent and counter kill the Hunter if is holding a sharp melee when a Hunter is about to be over him. He moves his hands holding the melee, and prepares to strike in the timing to pierce the Hunter and kill it in the air before gets over him. He can also do this without looking if is behind him, but this is almost impossible without practice but can happen.
- Has a move to stun the Witch before she gets to attack him, as using the back of the shotgun to hit her forehead and quickly shooting at her head.
- Has more endurance against the Charger, as he can hold being broken much better as delays the damage and pain for later when is safe. This means he gets -20% less damage from the Charger's hits after the charge.
- Has a move with main or melee to charge and push enemies in front of him while running to get space. He moves his weapon lateral to the left, places his left hand behind it, and pushes forward while suddenly starts running. This truck only works against commons. And is instantly counted by the charge of a Charger, hits from a Tank, rocks a Tank throws, a vehicle or anything a Tank hits and flies and hits him, and slashes from a Witch. But it blocks the jump of a Hunter and the jump of a Jockey.
He doesn't have any perk against the Spitter, as her acid affects him the same as to any survivor. Same with the Tank with it's strength extremely overwhelming him in every way and forcing him to back as any survivor would.
Nothing changes with the Booker either, as all the Boomer does is vomit over the survivors to make the commons be attracted and attack the survivor/s with Booker's vomit. And the explosion of the Boomer when dies is almost the same, except it affects him slightly less as he takes either two or three steps back instead of the four or five any survivor does.
He can also endure more from the commons than the average survivors, as if he was using armor or any protection.
He also can get up by himself if is downed and not attacked by an infected. He can also protect himself from any infected directly attacking him to not receive damage as is something no survivor can do or did in L4D or L4D2, but can't if is downed by the charge of a Charger or the hold of a Smoker or the attack of a Witch or the attack of a Hunter.
He can also use his main gun or weapon when is downed and not attacked by any infected. An example is when he manages to push a Hunter off of him and gets the enough space to grab his shotgun to shot the Hunter.
He can also roll to evade attacks when is downed, and can slide when runs to dodge as cars or other things a Tank hits to attack and instadown survivors or rocks a Tank throws or when us close to a Tank and just slide to dodge it's punch to not stop running to move back or dodge in other way.
The backfires are the items that heal, as gets -40% from medkits and after use is not even instant heal but an upgrade to his regeneration to a slow heal recovery. And is better be used when he gets infected an injury, so after the use of the medkit the injury is cleaned and gets rid of the infection.
He also doesn't get any benefit from adrenaline in health but gets more faster, endures more, and his regeneration slightly speeds up.
And the pills heal him instantly but if uses multiple it doesn't heal and weakens him against KALIVIRUS-09 to infect him as the overuse of pills to heal makes the amount of disease inside the pills actually infect him and weaken him for the KALIVIRUS-09 to infect him easily.
[1] This name was created by @avlegends8883, I discovered this in this video in YouTube: https://youtu.be/5nKC12vvSzM