After you read this one you can see where it's going. If you use this idea it wouldn't bother me if you use this as the first chapter

Fire Emblem/ Monster Girl Musume

A man that looked like he could be in his mid to late forties sat in his LaZBoy playing a 3DS when the calm was shattered by a scream.

"ZELREEEEETCH!" Came the call of an indignant female.

"Well she's up." Zelretch stated with a smile saving his progress and shutting down the console so that there were fewer breakables out and about.

There was a clatter of many feet leading up to his door before it burst open.

"Good morning my apprentice. Though I must say that is not how I thought you would look.

"Cut the crap Zelretch. What did you do?" The young woman growled as she flexed her exoskeleton covered hand. Her very sharp looking exoskeleton covered hands.

"Well about that. I was bored." Zelretch answered with a smile.

"I figured that, but tell me why do I look like an Arachne monster girl?!" The angry woman yelled her voice turning into a shriek as the sentence finished.

"Now don't get your panties in a bunch Rin." Zelretch said waving off the irate woman. "The entirety of The Clock Tower is surrounded by a bounded field that changes every female in the vicinity into Monster girls. It'll wear off in about a week and don't worry you'll be human again whenever you leave the building."

"How does it determine which monster species to turn us into." Rin asked calming down after she ran out of steam as it was to much work to stay mad at The Wizard Marshal.

"A number of things personality, blood type, body type, etc., etc." Zelretch answered sporting a disappointed look. "For instance knowing you I thought you would be Lamia but as you can see I was wrong."

"Fine you've had your fun for the day so what do you have for me today master?" Rin asked in resignation.

"Funny you should ask." The holder of Kaleidoscope stated with a contemplative look. "It actually is in relation to the bounded field that I placed."

"What did you do now?" Rin asked hanging her head.

"In a certain world I introduced a few of most species of monster girl." Zelretch answered.

"Just tell me so that I don't have to weasel it out of you." Rin ordered starting to get ticked off again.

"Very well." Zelretch said sighing. "Lamias and subspecies, Harpy and subspecies, Mermaid and subspecies, Arachne and subspecies, Monoeye and subspecies, Dryads, Kobolds, Scorpion, Dullahan, and the Insect subspecies and a few others I don't remember."

"What no Centaurs?" Rin asked. "And what about the Werebeasts?"

"Centaurs are over done, and they already had Werebeasts." Zelretch answered with a shrug. "And their royalty were descended from dragons so that's covered. Furthermore all of the species I added are all female populations. Because of their unique genes any female offspring will be their mothers species and all male offspring will be human with some varying benefits."

Rin groaned as she held her head in frustration.

"It's already been two thousand years in that world since I did that and I must say that they melded with the locals of that dimension just fine." Zelretch explained with a smug look of satisfaction. "About now in that world a certain tactician will be found in an empty field where he will become the princes' and soon to be exalts' best friend and tactician. They save the realm blah blah blah. Then stop an invasion blah blah blah. Defeat the fell dragon Grima that's trying to destroy the world blah blah blah." Zelretch iterated as quickly as he could which caused Rin to lean back against her abdomen groaning pitifully. "Now that that's done your assignment today is to send someone there from a world where the observed realm is fiction."

"Do they need to replace the tactician?" Rin asked from where she was laying covering her eyes.

"Not necessarily, they just have to be close to the royal family so that they can affect the worlds outcome." Zelretch.

"I see." Rin mumbled moving to the other end of the room and even onto the ceiling as she paced.

"Take your time, no rush. It's not like that dimension is going anywhere." Zelretch said as he laid back in his chair waving a hand altering the layout of his ceiling almost growling in frustration when Rin completely bypassed it. Then he felt her starting to weave the magic of Kaleidoscope as she paced giving him a very sinister idea it was so subtle it couldn't possibly be detected. "What the Hell Apprentice?!" Zelretch yelled in shock as he found himself bound in web.

"Keep your hands out of this master." Rin said her six eyes boring down on the poor guy, clenching a fist that gave off a sound similar to knives rubbing together.

"I can't say I know what you're talking about." Zelretch said attempting to look innocent.

"Hmm." Rin grunted out as she finished weaving the magic of Kaleidoscope. After feeling it out a second Rin dropped to the floor glaring at the tied up Zelretch. "What did you do?"

"Well whatever it was it's done now so why don't we just sit back and watch." The Wizard Marshal said as he disappeared the webbing and got comfortable in his chair.