The Three of them moved after of what they have discovered of the skeletons it made them all angry because of the umbrella's Experiment to the people 

With it they have fight even more Zombies than they have though

"They are more of them than the last time" Said Billy as he fired his Shotgun in the Zombies Head killing it

"I know" Said Ronan as he reload his bolter while stomping a hunter in the head "And they are more aggressive" He added as he Fired his Bolter killing 3 Zombies

"Do you Think they have been sent here to attack us?" Rebecca Ask as she Fired his pistol killing 4 Zombies while dodging from a bite then fired her pistol killing the Zombie 

"Possible Rebecca" said Ronan as he hit the Hunter with his Bolter Then proceed to fire from it's head and spine killing it

"That's only the Explanation" said Billy as he fired his shotgun and kick another Zombie in the head and fired his shotgun killing it 

Then 6 Insect attack them

They attack fast while others climbing the walls and sewers While they were able to dodge to Rebecca and Billy, Ronan was able to hit them without difficulty

3 insect were killed by Ronan

while the 3 jump Rebecca were to hit their weak spots killing the insect while Billy Fired his shotgun making a hole

Ronan saw the other last he throw his knife hitting it and died he walk and he took his knife and stomp the insect for making sure that it  is Dead 

"Alright Let's Moved" Said Ronan

The Nod to him

"Hey Ronan" Said Billy "After this were are you going?" He ask curiously  he knows Ronan may be big but his armor can be question unless he can hide it the people may still though of him to have a giantism or just a basketball player it will be a good cover for him

"Billy's Right Ronan" Said Rebecca "What will you gonna do?" She ask

"If i can't Go back then i will have no choice but to hide" Said Ronan he already knows the spenzer mansion he sure as hell his Father Primarch Roboute Guilliman will be question why he is bigger than him by Jill Valentine 

"Well that's your logic i hope you know how to Hide yourself" said Billy hiding is the best course to Ronan

While in Ronan's Mind he will not mess with his Father's Existence 

"That will work if he can hide armor and well he will look like Normal Human but with giantism" Said Rebecca

"Hiding my armor will not an Easy Task finding some cloths for my own size?" Said Ronan as he looked at his Body "Yeah it will be even more difficult to find for my own Size" He said

Rebecca giggled at that "Well you will certainly find your own cloths to buy, i'm sure you can" she said Then she giggle again as she imagined him for being discomfort 

"Your Cute Rebecca if you giggled" Said Ronan

That which Make Rebecca Blush 

Billy Chuckled at that in this Situation someone needs to ease the tension "Yeah his Right" He said

"Sh- Shut up you Two!" She said Stuttered 

Time skip

 They Entered a some kind of Nest they're are many worm like creatures and they saw a Man with Robe as if he waiting for them

"Welcome, Young ones and Stranger" He said "So glad you have joined the party, You are the guest of Honor. After all it's your wake"As he spread his arm as he do an Evil Chuckle 

"Who are you?" Billy Ask in threatening voice

Then he Transform of an Old Man

"Dr. Marcus?" Said Billy Surprise

"No, You can't be" said Rebecca "What's going on?" She ask

While Ronan Stared at the Man angrily 

"Ten years ago" The Old Man Marcus begun "Spenzer had me assassinated" He said as he retell his story "However, Something Wondrous happened. It took the T-Virus inside my queen years to procreate my new life" He said and Return back to his youthful appearance "I live. Now i will have my Revenge on Umbrella and the World will Burn in an inferno of Hate" He Evil lough 

Billy Pointed his hand to Marcus "You'll pay for what you've done" Said Billy 

"I Will Kill you and Purge your Heresy!" Said Ronan in anger he is already reminded him by this Man of being Nurgle's Cultist 

"We'll see which one of us is gonna Die" He said and he Begun to transform to something monstrous 

Ronan Finally unsheathe his Power sword and Activate it's force field 

Marcus Jump at Ronan which Ronan Barely Manage to dodge then Marcus use his Hand Smash Ronan and fly towards several Walls

While Rebecca and Billy Dodge from his attempts as they fired at him with their weapons but it barely affect on him

"His harder to kill than i though" said Billy as he fired his Shotgun and hit it Marcus but it healed while Rebecca able to throw a grenade which she pick it up and it explode near to Marcus it Damage him and slowly to stand

Ronan had already stand and attack Marcus he punch Marcus then he cut his hand then Ronan use his free hand and grab marcus foot and begun to smash him to several walls then he thrust his sword To Marcus Chest and he did not moved afterwards

"Are you Okay Ronan?" Rebecca ask

"Yes, We must go now and leave this place" He said

"I Though you would never ask" Said Billy

The three moved towards the Elevator 

They saw a Metal Door Ronan Punch it Through

"Ok let's go" Said Ronan and they Moved to the Elevator 

The Elevator lift up

After some Minutes pass The structure begun to Rumble

"The Self Destruct system has been activated" Said by the Computer  "All Personal Evacuate imminently. Repeat"

"Who Activated the self destruct system?" said Rebecca

"Whoever it is... I'm sure they have already know what's happening here" Said Ronan

"Come on Can't this thing moved any Faster" said billy frustrated 

Then they saw Marcus still alive and mutated to even bigger monster

"It appears the idiot still lives" Said Ronan as he Aim his Bolter fire hitting Marcus and slowing his down

Then Marcus accelerate and attack the lower Elevator making them sent fly towards the upper level but no injuries

"Time to end This" Said Ronan as he unsheathe his Sword again 

Ronan and Marcus Charge again Ronan able to hit several cuts to Marcus but Marcus swept Ronan

While Rebecca and Billy support Ronan

He stand again and Attack this time he aim his Plasma Pistol to Marcrus and he scream in Pain then he above and saw a sunlight

 "Ronan, Billy It can't handle sunlight" said Rebecca "We need to opened the windows" She added

"You two work on the Windowns i'll handle him Plasma weapons can be a exploding sun he will be hurt" Said Ronan

Both Rebecca and Billy Begun to opened the Windowns

"Come on Marcus i'm your greatest Threat" Said Ronan as he moved back were there is more windowns

As  Marcus charge at him he Dodge and Cut one it's leg and several more cuts he fired his plasma pistol again

and he switched to Bolter and he fire it's attached Flamer (It is also been blessed making it as powerful  as the Incinerators that can burn Demons) burning marcus and Billy and Rebecca were able to successfully to opened the windows

"Hey queeny!" Said Billy "Feast on this"

"Your Madness end here!" Said Rebecca as she point her pistol

"Your Heresy End Here Abomination" Said Ronan

Then Both Billy, Ronan and Rebecca Aim Their weapons at Marcus Chest and Fired while Ronan Begun to fire in full Auto with his blessed flamer

Finally Killing him and fall towards the elevator and cough at the explosion while still his body burning and severed parts 

The Three Run and Able to Escape

Time Skip

They were in the Hill and the Spenzer Mansion could be seen

The Sun Rises

Ronan Removed his Helmet

"What a Day" said Ronan

While Billy Seat on the grass

"Hey" Rebecca Begun "That must be an Old Mansion that Enrico was talking about" Said Rebecca

Then Rebecca Took Billy's Dog Tag 

"I guest it's time to say goodbye" Said Rebecca as she put Dog tag into her neck "Officially Lt, Billy Coen is Dead" She said Softly 

Then Suddenly they heard an Aircraft they looked above and saw a Thunderhawk Gunship

descend to the sky 

The Thunderhawks Ramp opened to reveal some Ultramarines and Took a Defensive position

"Commander" said One of the Ultramarine Captain "We are here to return you  Home" He said to him

"Are the Battle over?" He ask

"Yes, Brother it is successful" He said 

"Good" said Ronan

and He turn to face Rebecca and Billy

"Will we see you again Ronan?" Rebecca ask

"Well that's a Possibly Rebecca" said Ronan "When i do expect me to have with some adventure with you again" He added

" I'll be hiding but it's an honor to fought alongside with you Commander Ronan" said Billy

"Can you two keep my Existence a Secret" Said ask

"Yeah Sure after what you done to us it's the least we can do"

The 3 Salute and do their separate ways

As Ronan is about to Enter the Thunderhawk he heard Billy Said

"Thank you Rebecca, Ronan" Said Billy as he Thumbs up

Ronan do the Same to them but which awkwardly 

Rebecca Giggled "You'll do it better next Time Commander and Good luck" She said

"May your God's grace you my Friends" Said Ronan as he Entered to the Thunderhawk

He has returned to his Flagship the Sword of Ultramar

"Bring us back to our Galaxy Cassandra" Said Ronan to his Ship A.I

"Understood Commander Smurf" Said Cassandra cherry  Tome "And it's good to have you Back" She said Softly

"Yeah It's good to be Back Cassandra" said Ronan

As the Ship Entered through the Warp

And the Good News is no one has saw him

____________________________________________________________________________________________________

Time skip

He Return to Ultramar

"So how's your Trip Brother?" Said Nath

"I Have gotten to the Galaxy where our Father visit" Said Ronan

"You mean with the Zombies?" Said Nath

"Yes, but i did not reveal the future and i don't want them to expect our Father to come" Said Ronan

Nath Nod "But it's good to have you Back and did you find some  cute girls?" He ask

"Yeah" Said Ronan

"Tell me about her then" Said Nath

"Well she's Kinda Cute, Strong, Kind and Courageous" said Ronan as Smile appeared in his face

"And i hope to return there one day" He added

________________________________________________________________________________________________

And Done 

His Stay with their is Over

But One Day they will Return

As Roboute Gulliman is possible to return there as well