Phase 1: Incubation
Normally between 6 to 24 hours, but to Raziel would be between 9 or even 12 hours to 32 or 40 hours. Depends on his state, and if his immunity system does a good job or just unables KALIVIRUS-09 from infecting right away.
For much his immunity system can be boosted, this is mostly random, as can either affect him very shortly and have less time, or the same time as anyone, or take longer, or even not get affected.
Using a simple bacteria affected him very shortly to his stomach and then to his vision and brain, despite was for a short time of a moment and then his immunity system got rid of it, this already gives away is not as boosted as mentioned, and can also be for KALIVIRUS-09 too.
Phase 2: Infection
Normally between 12 to 36 hours, but to Raziel would be much less, as once infected and the virus fully incubated, he gets the whole punch instantly and is weakened, making him vulnerable despite his immunity, as that will not save him.
In this phase and period, KALIVIRUS-09 would get a great advantage in the infection process, getting a boost in the race to infect him.
The symptoms are slightly different than to anyone else tho, as would have delusions, constant hallucinations and worse than he already has but in a worse state, fever as anyone else would, physical weakness, stomachache and a constant possibility of throwing up at any time, incapacity of breathing from his nose, flu, coughs, spicy neck to cough or just feeling it spicy, dizziness, incapacity of any focus, tiredness, and many more I can't get right now.
Phase 3: Infected
Normally between 24 to 72 hours, even for Raziel.
In here, anyone would become a common, the average infected in L4D and L4D2. But for him is different, as are two states, the first one where is very aggressive and a wild animal like any other common, and the second one where despite being is capable of holding himself but remains very irritated all the time and is incapable of thinking straight or being himself in a normal way and barely holding himself in one piece from just fighting or tearing anyone or anything into pieces.
In this phase, he will force anyone to get away with the excuse that he can't hold any social interaction, even minimal ones, to isolate himself.
He would also be photophobic, almost constantly growling and vocalizing, and with internal eye hemorrhages.
Phase 4: Mutation
Normally between 3 to 7 days. Probably more to Raziel, but is highly unknown.
KALIVIRUS-09 will use his anatomy and biology to its favor and benefit, using all his perks and strengthd with all the boosts it can give him.
He would become the paladin of infected, a Gunner.
KALIVIRUS-09 would make him stronger, using his intellect and mental capacities to allow him to have a better focus and be a general for leading hordes, set traps, and hold his ground despite the amount of times he gets shot by survivors.
He would be granted with physical strength, boosted intelligence, tougher skin, extra stamina, erasure of lungs issues, and a even better regeneration to heal any internal injury no matter what it is and to heal very quickly any injury at all if it's not impossible to heal as any loss of a limb or head or body parts and so on.
Can lead an horde (not small group of infected but big ones), can prepare traps and ambushes, can tank shots and still walk foward as if is not being shot, can use guns and other things survivors can, and is very highly intelligent and aware (even if is a wrong awareness, is still aware).
Is capable of using mute signs and communicate with survivors with hands and gestures. But is very dangerous as the green flu makes him hallucinate with things don't exist, and if a survivor tries to surrender, he could see a nonexistent threat or gun, and kill the survivor either way.
He sees the infected as survivors who go fight in close combat, and survivors as infected with strange reasoning. He wonders, but as he also hears the infected talk to him, he hears stuff are not real but that make him not question anything and just focus.
He leads an horde, and even other special infected, but that doesn't guarantee they will obey or even listen to him, and will just follow.
He can do everything a survivor can, from using guns and any weapon, to use bombs and other items, drive and throw away things, and more.
And he has 2000 HP with a max of 4000 HP, plus 400 Armor Health Points if is wearing military protection that can be replenished by searching in the corpses of militaties. The AHP absorbs more DMG because receives -40% less DMG from guns and -60% less DMG from melee. But the AWP as other snipers and even the dessert eagle and revolver, as so other high powerful guns can easily break through and not only heavily damage the AHP, but also pierce it to deal DMG to the Gunner.
Another thing is that every infected can spawn, but the Gunner is one and only per match and if dies is dead for the rest of the match.
He can also be wearing a military backpack with loads of ammo for himself, for better organization of his weapons, extra cover for the Hunter if holds to his back and even as for the Hunter to place it's feet over while remains it's hands over his shoulders to not tense it's muscles, carry pipe bombs and other items to throw, extra protection for when the one he wears breaks and needs to change it, a gas mask or any other facial mask or item to cover his face, and extra clothes of casual and military clothes to can camouflage himself with ease. His preparation is thanks to the boost on intelligence as can analyze moves ahead every survivor that seem impossible to predict and see even necessary to take.
There are many type and archetypes of Gunner, as all depends on the personality and mindset of each Gunner.
If the Gunner is more chaotic, will never accept any surrendered survivor and kill them for the chaos and enjoyment of the moment.
If the Gunner is evil, will kill regardless of anything, just for the joy of killing.
If the Gunner was a military general, will remain with the principals of any militant.
Raziel would be merciful but cautious, and also volatile. Is not 100% one archetype, but is more predictable to be similar to a military general in behavior, but mostly by his kind side and merciful view, sparing the surrendered survivors but making sure to be cautious and vigilant.
A little detail about Raziel as a Gunner, is how a Hunter can be over his back and being carried by him as Hunters normally like to be carried by him in that way for cover and prepare for jumps to survivors or to around them and surprise them.
Another thing to have in mind is their perfect camouflage. A Gunner can be among survivors without being noticed, as the only thing that does delate him is his face, more specifically his eyes in case of Raziel or other Gunner with the same bleeding in the eyes.
And how they can lead 3 main different types of armies: Army of commons, big group of special infected, and an army of commons with many special infected. There are also combinations and many more that could happen, but inside those three main possible armies a Gunner can lead.