Megatron was sitting on his thone in the Decepticons main base of operation and the warship Nemesis listing to Starscream's long and boring talk about some plan to take out the Autobots until he felt a tab on his leg and look down to see his adopted daugther, Ruby, a between 5 to 7 years old human, is tabbing, a few times each, his long, gigantic, robotic leg, which basically tell him that Ruby wanted to talk to him. Which he is glad for, because he didn't to his second in-command's plan. He get up from his and kneel down to see Ruby due to her being smaller than everyone in the base.

He asked Ruby in an concern tone "Ruby, what do you want?"

Ruby tell her gigantic, alien robotic adopted father in a scared tone, not because of her father, but because of something else... "Daddy! There were two big boogiemans, big as Starscream, in my room! one blue and one green! And they in the room!"

Megatron thought it was Ruby's mind was playing trick on her or she has a bad dream, as any 5-years old child can have. "Ah, of course, Ruby. Two gigantic boogiemens were in your room and they were big as Starscream and they were color blue and... green... and they are... in... the... room... right now..."

Megatron then begun to realized that his adopted daugther that she must have saw someone that nobody saw in the Decepticon base due to her special silver eyes. If there was someone in the base... then must mean this someone is a spy!

He immediately transformed into Twin-Headed Dragon Mode and decide to ask Ruby to point of where the boogiemens were. "Where are they, Ruby?! Point me to them!"

"Over there!" With Ruby, who is sitting in between of the two neck of the Twin-Headed Dragon Mode, pointed her adopted father to Starscream.

Much to Starscream's horror. "Wait... WHAT?!"

Megatron's dragon heads then both breath fire at Starscream, which him to yell in an panicking state. "AAAAHHHH! I'M BURNING! I'M BURNING!"

Then... two Autobots, Hound and Mirage, are on fire like Starscream and they panicking and yelling those same words like Starscream until the fire dead out, but the two Autobots realized they have been now spotted and now every Decepticon in the base glared at the two unfortunated Autobots, which include Starscream, who now covered in soots ad ashes from Megatron's flames. "Uh oh..." "This not good at all..."

Megatron, in his Twin-Headed Dragon Mode, told the two spotted Autobots those words of his when they accidentally disturb Ruby's sleep. "... You two are pretty much dead now..."

The two Autobot nerviously look at each other of knowing of what about gonna happen to them now...

Later... at the Autobot Base

Optimus Prime is talking to Ozpin on Teletraan-1 in the Autobots main base of operation and the ship that brought here on Remnant, the Ark. "Don't worry, i've send Hound and Mirage to infiltrate the Decepticon base."

Ozpin sighed with relief. "Thank you, Optimus. You and your Autobots have quite helpful to us."

"Your welcome, Ozpin."

Optimus then heard someone. "... Optimus... i'm back from infiltrating the Decepticon base."

He recongize that voice that only belong to Hound and he has some question for him. "Hound, where Mirag- WOAH!"

When Optimus turn around to see Hound. He was shock to see him damage everywhere on his body from top to bottom, missing his left arm, and his shoulder cannon now gone. Hound decide to give out an short summary of what happen. "We inflitrated the base. We been spotted by someone through my hologram and Mirage's invisiblility. I've been beating, we have no clue what the Decepticons are up to, and now Mirage is dead."

Hound then just fall flat on the floor of the base.

There was silent in the room before Gears then snark at the stitution. "Welp, we're screwed."

Optimus was annoyed by Gears' comment. "Gears, this is not time right now."

A/N: It was based on the Mama Cinder AU of Kinzaibatsu91 on Tumblr. So i thought "Hmm... so Cinder is Ruby's adopted mom in that AU, so what about..." and that when are i first thought of a crossover of RWBY and Transformers.

If want to know what each transformers they look like, i tell you...:

Megatron look like his "Car Robot (Or Robot In Disguise (2001)" version

Starscream look like his "Unicron Trilogy Cybertron" version, but with his personality being more similar to his G1 and Prime version.

Optimus Prime look like his "Unicron Trilogy Cybertron" version.

Hound and Mirage look like their G1 counterparts.

Gear... you know he look like.