*prior to that time*
*desert zone*
In the land conquered by sand, the unimaginable drought made it look like the land is devoid of life.
The desert zone, it used to be part of a city, but has lost its vegetation due to drought, which caused the soil to erode and become sand, easily shifted by the winds.

But on top of the hot sand, lies a machine corpse with visible cuts and stabs all over the machines body. There were others too, and aside from cuts and stabs, there are some kind of tribal tattoo's all over the machines body.
*CLANG*
A sound of metals clashing to each other, was heard further from this uncountable number of Machine corpses into the desert.
*CRASH*
A machine crashed away from the center of the group of machines, laid in the sand dead and lifeless.
"E-Enemy-" another machine wasn't able to finished its words before it was cut off literally.
"K-Kill..."
"E-Exte-erminate"
The desert machines were being massacred by an assailant that looked like a woman, if her proportions are right, wearing some kind of beak mask with a cap, a coat that has the appearance of black feathers, and wearing some sort of garb underneath.
'Hmm.... Only 5 are remaining, this should be over soon,' the assailant thought, while cutting the other two with deadly precision before going to the remaining three.
"Ssss..... cared....."
The machine with a piece of cloth on its body was separate into two diagonally
"Enemy..... scary..."
The one with the hood was brutally slashed throughout the body
"Run-"
The assailant pierce her blade through the eyes of the last machine before it decides to flee, the machines eyes sparks for a bit before it turned dim.
The assailant flicks her blade as to remove some oil from the machines and cleans it with a cloth. She slids is back to its sheath under the feather coat.
"Hmm.... That's 187 now since I came about and madam gave me the order," the now identified
Eileen uttered. "though the machines in the desert are vastly different compared to the ones in the ruined city"
And that was five-hours ago when she travelled to the place, and avoid the ones that Andy pointed out as she worded out "not our problem yet".
Compare to the machines in the ruined city, the machines in the desert were very aggressive and used the desert to its advantage of laying traps and ambushes.
'Though a mere trickery won't be able to defeat me, an automaton created by madam,' she mused to herself, while travelling back to the tree-house.
She already covered a large areas of the desert and its terrain, which is why it is easy to traverse for her. Well she won't ever get tired since that is how she was made to be.
"I may be an expendable to madam but I am loyal to the end and to my purpose. If madam thinks it is necessary then it shall be done so," Eileen concluded, as she continues to go over to her destination.
______________________________________
*ruined city*

The ruined city, a large open city almost completely reclaimed by nature. Machines and wild animals roam the landscape. Sometimes androids who are scouting the area as well. But Eileen tends to avoid them whenever possible.
Eileen was halfway from her destination when she heard a ruckus to her left, and immediately hid behind a debris. She took a peek and and confuse to why are there a bunch of machines. They're not rare in these parts, but the question is why are they acting as if they're searching for something, or someone.
'Only 25 are visible, I don't know if there are others lurking in the corner.' Eileen counted, before she continue to observe.
'Though these machines are unlike the ones from the desert, so chances traps and ambushes are low,' she concluded, and prepares her blades of mercy.
'No matter, my preys are in front of me. A hunter must hunt,' she gave her final verdict, and then she sprints towards the machines.
Before the machine had a chance to notice their assailant, seven machines have already been destroyed.
'18,' she counted.
Another 5 destroyed due to her precise stabbing on the gap of their necks. Resulting the very weak part of mechanisms to destabilise and destroyed.
'13,' she counted
Eileen was about to continue when she felt a different presence, and immediately use [Presence Concealment] to retreat and survey the different presence she felt.
'Is it an android? Or a machine?,' she assumed, as she continues to keep an eye out.
"AAAAHHH," a female silhouette roared at the remaining machines.
Eileen watched as a female android decimated the remain machines like she was used to it. She concludes that she was one of the androids that scouts the perimeter. But she revised her conclusions.
From what she observed, the android was a mess, the android looks like it doesn't have a proper maintenance in a while and her looks are a horrible mess. The android's cloths were almost nonexistent, and by nonexistent its only a single piece of cloth covering her midriff.
It may look like the android wore a black shirt and a top, but in reality it was an expose exoskeleton. Eileen thinks that it is more than a while since the female android had any maintenance. The skin has already peeled of from her chest, arms, legs, and hips.
"BOOM*
'Does she even know subtle at all? She might look reckless in others point of view, but I can tell she knows what she's doing' Eileen concluded, the android is not stupid to say the least, 'well at least there's no machines in the vicinity, or they would have heard the destruction cause by that android.'
As she was about to withdraw, before her instincts kick in and immediately used [Art of Quickening] to dodge from being impaled by a sword.

"Tch, I knew something feels off," the dirty android grumbled, "You, your one of them are you... You must be a new type E android. Damn until now they're still using me for testing some of their sh*t"
When Eileen heard her, she was thinking if she would answer her or remain silent. In the end she answered the grumpy android.
"I have no idea what you're talking about android," Eileen commented, "I was about to leave before you initiate the attack"
"About to leave huh, I would have believed that if you didn't hide while I was fighting, " the dirty android suspiciously said, "and I ain't taking any chances, I've been anonymous for quite some time, and I'd like to keep it that way"
The android brandished her blade, a long katana, ready to strike at any time
Eileen stayed silent as she assessed the situation, and she doesn't talk too much and give any information about herself or regarding madam. She had confidence about her agility so she is certain that she can escape and losing the android through the building if the situation arises.
She evades the blade to the left, blocks the kick to the abdomen and returned it with a high kick
The android blocks the kick and was surprised by a follow-up blade by her supposedly, type E android to her midriff. She blocks it again and again another strike almost as instantly as the previous attack follows through the overhead.
They have several bouts after a couple of minutes, almost an hour. As they were attacking each other. Studying each others movement and pattern, looking for an opportunity to strike a fatal blow.
The android have great strength and endurance while Eileen have great agility and mobility.
'She's fast and deadly, trying to break my guard while she attacks, waiting for the opportunity to presents itself. This new type E android is much more deadly than the previous ones I've encountered' the android assessed, as she defend another strike to the chest.
"Tch, after I'm done with you, I'll send your body to your makers as to remind them of their another failure until now" she sneered, as she poised to strike.
'That's it, she's going down' Eileen thought with conviction.
While she would ignore the insults that would be coming at her, she would not ignore someone who would insult madam. She is loyal to the core literally, and now she will stop holding back.
The android felt something was wrong and backs away from Eileen. But before she could back up any further she felt something lands on her shoulder.
*CAW*

*TICK-TOCK-TICK-TOCK*
"What in the-" she was cut off when what she thinks a new type of machine, explodes.
*BOOM*
"AAAHHGG" She was able to dodge most of the explosion but that doesn't mean she wasn't unscathed.
That was one of Eileen skill [Create Explosive Crow Automaton], she can create an explosive crow around 50 yards of her. Unlike the [Create Crow Automaton], which can be use for reconnaissance and has unlimited range of connection. The explosive crow only has 500 yards of connection. Any further and the connection is cut off and automatically explodes.
The android was slightly a daze from the explosion. "What the f*** is that thing" she cursed under her breath. As she was about to stand up, she suddenly dodge to the right as Eileen pierce the ground of her previous location.
But unfortunately, another Crow intercepted her way.
*CAW*
*BOOM*
She couldn't dodge this time and got hit by a full force of explosion, and sends her crashing to the small building side as dust gathered around her.
'thankfully I could control the strength of the explosion and didn't use its full force. If I did she would have been destroyed from the first contact of it,' Eileen concluded. As she walks towards the androids location.
After the clouds of dust dissipate, Eileen saw the android was incapacitate, unconscious, and alive hopefully.
'Hmm.... Maybe I should bring her to madam, she might have some useful information regarding other locations or maybe Intel on the machines.' She concluded, before she bound the android on a special type of metallic rope. 'Better safe than sorry or it'll become troublesome.'
Eileen puts the android on her shoulder and continues on her way. Of course without realizing their battle was recorded via satellite.
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(3rd pov)
In a place where hundreds of clicking could be heard, with screens showing list of information, data, and any other important Intel. They are being gathered and stored to the servers to study and compiling it now or due later for any other important matter.
This place is called the "Bunker". The space station serves as YoRHa's main base of operations, acting as both a communications and deployment facility.
The Bunker is located in space, it cannot be accessed directly. The only way up is via a transport terminal in the some parts on the surface.

???: Are we seeing it right? Are you sure it wasn't visually edited or something??
Said a female android who wore an questionable get-up, looking at the footage via satellite from her screen.

???: Yes we double check it with the others, what we're seeing is real.
Said another android who wore the same get-up as the other one, probably a uniform, who is typing at a breakneck speed with precision.
They are called an android communication operator permanently stationed at the "Bunker".
As with other operators, their duties include sending directives to the YoRHa soldiers on the field as well as information analysis. Their designated name is also different from the others like type B's, type S's, type G's, type H's, type D's.
Like for example, NUMBER 6 TYPE O or 6O for short. Though their physical appearance is near identical to their fellow operators, there're subtle differences like hairstyle, ornaments, and behaviour.
19O: We know the other one is a traitor and deserter Attacker No. 2, but what about the other one? Is that android not part of the resistance camp?
74O: No, we already checked there already. There was no android who wore a strange mask or outfit in the vicinity. Can you at least track her down?
19O: Not possible, we lost visual contact when the android maneuver through the buildings.
19O said after she received negative results. She can't track it through frequencies and scans from the Bunker, it's like she's untraceable and the android was on the surface! Not deep underground!
74O: So either the android is a very old model or has been recently made. Though it is possible that their core could be block or protected through various means from our scans.
42O: Should I ask 6O to relay this to commander?
Ask another operator without stopping her fingers typing the keyboard with precision, who is gathering other data to see if there are any other unknown androids such as the one on the footage.
74O: No, ask 21O and tell her to relay this footage to the commander. The commander may be on the break, but this may possibly be worth of her attention.
Its not like 74O has any enmity on 6O or such, but because of her personality.... Let's just say she's just too bright.
After 74O relayed her opinion, 42O begins to send the message to 21O. She received the confirmation after a few minutes.
42O: 21O is on her way now.
74O: Good, tell the other operators to be vigilant of anything out of the ordinary.
She goes back to work and so are the other operators.
______________________________________
A2: PUT ME DOWN YOU SHARP FACED BASTARD
Exclaimed the now identified Attacker No. 2, or A2. Who finally regains her consciousness after an amount of time.
Eileen: it's a beak
While Eileen counter her in a monotone voice. With that however, A2 cursed and yelled profanities at Eileen while being carried like a baggage.
______________________________________