If Ruby Rose was sent to the undergorund, RWBY Undertale crossover

Ruby: Falls into the mountain into the underground "Oof, Whoa where am I?"

Flowey: "Howdy child."

Ruby: "Whoa a talking flower, that's so cool."

Flowey: "You wanna know what else is cool" emerges multiple deadly pellets "These friendliness pellets."

Ruby: "Friendliness pellets, that sounds awesome."

Flowey: "It is, catch as many as you can."

Ruby: "Okay, OW! What the hell, that hurt."

Flowey: "HA! Down here its a kill or whoa what are"

Ruby: takes out crescent rose "Die you little bitch!" attacks Flowey

Flowey: goes underground

Ruby: "Damn it he got away from me."

Toriel: "Hello small child, my name is"

Ruby: "OOOOO a goat monster."

Toriel: "Sweetie, you should know"

Ruby: "DIE!" kills Toriel

Toriel: "AAAAHHH" dies

Ruby: "A killer flower and a goat monster, I wonder what else I can kill here."

Weiss: "Ruby, I don't get it. I'm two years older than you, how are your boobs bigger than mine/'

Ruby: "Simple answer Weiss, I... Drink, milk."

Weiss: "... Excuse me."

Two hours later

Yang: "So anyways," walks in dorm "I was thinking OH MY GAWD, Weiss!"

Weiss: Mouth and body covered in milk with several empty milk jugs scattered across the dorm "DON'T JUDGE ME!" cries then starts to chug another jug of milk

Ruby: "Yoohoo, are there any monsters in here."

Sans: "Hey kid."

Ruby: "OOOOO, you're that skeleton guy that mysteriously disappeared."

Sans: "Yep and I want to talk to you about love, or in other words, level of"

Ruby: "DIE!" Swings crescent rose

Sans: dodges "Whoa, are you insane?"

Ruby: "I'm not insane, I'm just a teenager who's obsessed with weapons and killing things."

Sans: "... Yeah I'm pretty sure you got problems."

Adam: "I don't get it, Blake left me for an idiot like you, how is that even possible?"

Sun: "Maybe because I'm nice to her, I help her whenever I can instead of guilt tripping her onto my side, or maybe its because I never fucking stabbed her."

Adam: "Naw, that can't be it. Clearly there's something wrong with Blake."

Sun: rolls eyes "Yeah clearly."

Adam: "I just don't want to be alone."

Sun: "Well is there anyone else you know that's um... Edgy and sadistic and crazy?"

Adam: thinks

Two weeks later

Cinder: "You know Adam, I never knew how sexy you can be."

Adam: "I can't believe it took me this long to figure out how sexy you are."

Cinder: "You ready for some fun."

Adam: "You know it." takes off mask

Cinder: "Oh gawd."

Adam: "What?"

Cinder: "I'm sorry, but you are just crazy ugly. Can you put the mask back on, cause I don't think I can do this with that face."

Adam: "Fine." Puts mask back on

Cinder: "Okay, I can get into this, the mask is kinda kinky now that I think about it."

Adam: "If you wanna talk about kinky, how's about you wear these." holds cat ears

Cinder: "Are you fucking serious?"

Adam: "What? You're a disgusting human, how else am I suppose to fuck you?"

Cinder: "That I can understand, but why cat ears specifically?"

Adam: O_O "... Uhhhhhhhh?"

Chara: "Hello Ruby Rose."

Ruby: gasps "OMG!"

Chara: "Thank you for killing everyone in the underground I"

Ruby: "You are just so cute, aw look at those stubby little legs."

Chara: "What, my legs aren't stubby."

Ruby: "AAAAHHH I just want to squeeze you until you pop." Tackle hugs Chara

Chara: "HEY! Let go of me," struggles "I am not cute, I am the lord of darkness!"

(A/N lol, I recently got into undertale and I had to write about it)