Houkai CH3

Act 1:
The team arrived to New Zealand. Before they got there a disaster energy signal was detected and now the place is crawling with zombies and extraordinaire enemies. New Zealand is in chaos and as expected the "Desire Gem" has been lost somewhere.

Theresa: Kiana-chan~ I heard you've been asking Major Himeko about the data we got from the ghost battleship? Would you like to know what we found~?
Kiana: Aunty... I mean Theresa-chan, you cutie!
Theresa: What did you just say?! Oh well, according to the data we obtained, the battleship was using barely 1 out of its 24 engines and all its systems were offline. For comparison, our ship Hyperion needs 1380HW to operate, meanwhile the Moonlight Warrior needs a total amount of 12000HW to work at full power! Certainly very interesting. Incidentally, the energy recorded during The Third Ruler awakening was of 3200HW. You know what this means? You would need 4 of them to power up the ship completely!
Kiana: In my dream I heard something about 4 keys...

The team starts to explore the area and Bronya says there are life signs 50m to the East. It's a black haired women on a wheelchair.

Act 2:
Himeko: It seems you've found your target.
Mei: Our target? Wasn't it the "Desire Gem"? What we found is a girl.
Himeko: According to our intel, that girl is the "Desire Gem".
???: Uhm... My name is Wendy.
Himeko: Let me explain. 3 years ago during an experiment the "Desire Gem" was implanted into Wendy's body, expecting it would raise her energy levels.
Mei: Now that you say that, it does seem an immense power is coming from her. It's hard to believe.
Himeko: She was expected to become one of the 4 S Rank Valkyries in the world, but sadly she couldn't control the power of the gem.
Wendy: Because of that I lost control of my legs and now I have to use a wheelchair.
Mei: Then why no one removed the gem from her? It's because of it she's now bound to a wheelchair.
Himeko: The "Desire Gem" is very unstable, but inside Wendy's body it remains stable.
Mei: So the Destiny Organization is willing to ruin Wendy's body just to keep the gem under control? That's going too far!
Himeko: No point in fighting about this right now. Focus on bringing Wendy back to Hyperion safely.
Wendy: Are you sure? It's hard to move around in this wheelchair.
Bronya: Bronya does not think you are a liability. 19C, activate.
Wendy: This is a robot?
Bronya: 19C, let Wendy ride you. With this things will go smoothly.
Wendy: Eh? It lifted me!
Kiana: Amazing! Didn't know your robot could do something like this. Let me try next time!
Bronya: No.

Bronya feels extra nice today. She knows what it feels to be used as a test subject. She was also very fragile for a while but got better after going through surgery, giving Wendy hope she one day will be able to do the same.

Act 3:
Bronya calls Himeko asking if they can remove the "Desire Gem" from Wendy after they get to the ship. Himeko says it's too risky, separating the gem from Wendy's body means it'll become very unstable and a huge amount of disaster energy could be released at once, destroying everything around it. Kiana objects but Wendy says it's fine. Just like Valkyries, she's protecting people in her own way.

They arrive at the rendezvous point. As they wait for the ship's arrival, the energy inside Wendy starts to rise. Boasting of a powerlevel of 2000HW, Wendy says she hates them all and that is going to kill everyone. Himeko wonders if she's doing this out of her own free will or if she's being manipulated somehow.

Act 4:
Kiana: Wendy... She flew off somewhere...
Himeko: I'll report this to HQ immediately and request the aid of a S Rank Valkyrie. We need to capture her quickly.
Bronya: Bronya does not think Wendy is capable of hurting others.
Himeko: There is a chance her personality is being twisted by the disaster energy.
Kiana: I believe in Wendy! Back then when the same happened to Mei-senpai, with my help she managed to calm herself!
Mei: Like Kiana says, if we help Wendy, it's possible she might go back to normal.
Himeko: After I report it to HQ it'll take about 30 minutes for a S Rank Valkyrie to arrive. Got it? You have 30 minutes to think of something.
Bronya: Major Himeko. Thank you.
-
Himeko: I have bad news. HQ has declared Wendy to be The Fourth Ruler and confirmed they're sending a S Rank Valkyrie to deal with her immediately.
Kiana: S Rank Valkyrie?! Man I'd love to meet one, but not right now...
Himeko: The one dispatched is Durandal. She wears a black helmet and wields a lance. Among the active S Rank Valkyrie she's the strongest.

Act 5:
Himeko: I also have another piece of bad news. Our satellites have spotted 5 battleships heading to your location from the Pacific Ocean.
Mei: Battleships?! It can't be... The Negentropy forces?
Himeko: It seems so. You three, listen to me carefully. At all cost do not engage with the Negentropy units. We can't afford to lose you all.
Theresa: Kiana~ I'll give you a hand. Those fools from Negentropy seems to have made their move. This is a good opportunity...
Kiana: Help us how?
Theresa: You'll know in no time.
-
Kiana: Wendy! We finally found you!
Wendy: Why are you coming after me... You want me to kill you? You think you can beat me?!
Mei: Wendy-chan please, come with us! This place is dangerous! A S Rank Valkyrie is coming! The Negentropy forces will arrive soon too!
Wendy: A S Rank Valkyrie is coming? Very well, I'll test my power with her. We'll see if my powers are on par with a S Rank Valkyrie!
Kiana: You're more sturdy than me. Last that you got me by surprise, won't happen again!
Wendy: I don't want to make Bronya-oneechan sad! I don't want to fight you! Don't come after me!
Mei: She flew off again...

Act 6:
In 2 minutes the S Rank Valkyrie will arrive to New Zeland. The Negentropy forces will be soon there too. Theresa says you don't have to worry about the S Rank Valkyrie nor the Negentropy battleships. She doesn't have the authority to abort the mission, but she convinced the Valkyrie to go after the Negentropy battleships first.

Wendy: So persistent! If you want a fight so badly you got it!
Kiana: Hah! That's my line!
Mei: Wendy-chan, believe us! You're just being controlled by the disaster energy! This isn't your real self!
Bronya: Kiana, please wait. Bronya would like to talk with Wendy.
Wendy: Don't come! I don't want to talk! Bronya-oneechan don't come any closer!
Bronya: When Bronya was small, she knew someone called Seele. Seele was like Wendy, a kind and strong girl. Seele also fought the disaster energy like you and managed to win. Bronya understands Wendy's pain. Do not give up. Bronya will continue to believe in you.
Wendy: I believe Bronya-oneechan... If Bronya-oneechan believes in me, then I want to believe in myself too!
Mei: Wendy-chan returned!
Kiana: I'm relieved. Even though we're super awesome Valkyries that could have handled this anyway.
Bronya: Wendy. Come home with Bronya.
Wendy: I want to ride the robot again. Can I?
Bronya: You can. 19C, activate.
???: Bronya, my daughter. Kill The Fourth Ruler right now. The Fourth Ruler is a precious test sample. If we can't capture her then we have to kill her. We cannot allow her to fall into the Destiny Organization's hands!
Bronya: N-No...
???: Haha. Your mental resistance is a bit stronger now. Resistance is futile. Authority override. Our forces will be here soon.
Bronya: 19C, change to offensive mode. Target: The Fourth Ruler.
Kiana: Stop! Bronya-chan what are you doing?!
Wendy: Bronya-oneechan... W-Why are you attacking me? Was it all a lie? I can't believe in anyone anymore!!

The woman cannot wait anymore and used her robots, who were in stealth mode until now, to defeat The Fourth Ruler in one hit. She also orders Bronya to capture The Third Ruler, Mei. Time is up and reinforcements arrive just before Bronya can kill Kiana. That day Kiana lost two of her precious friends to Negentropy.