Twin Terror - Myra VS Arym

Prologue: Arym's Mission

Arym
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The joys of being a citizen of the Blood Dimension! We prey on the weak who dare to venture through, and feed on their blood. Most people in this dimension are solo people, but there are a few exceptions of us who are darker twins of people in Mobius. Take Esor for example, her goody-goody twin, Rose, lives in Mobius, and Esor sometimes sneaks out of the Blood Dimension to take revenge against Rose.
I too have a goody-goody twin. Her name is Myra. She's bubbly, energetic, friendly... BLECH!
Complete opposite of me!
I see someone in an attire of a royal uniform approaching me. "Arym."
"What is it?" I ask.
"Princess Stealth wishes to see you," he replies.
Princess Stealth is our ruler, and she is due to be coronated as our Queen one day. She is a cross between a hedgehog and a vampire.
When I stop outside her castle, I take a look at it. Black, with some stains of blood. The royal guard escorts me in as we walk towards the throne room.
"Wait here," the guard says, entering Stealth's throne room. Probably to say I'm waiting outside.
The doors then open widely, and I walk in. "You wanted to see me, Your Highness?"
On the black throne opposite of where I am standing sits Stealth. White fur and muzzle, yet her raven hair and her black dress adds a contrast.
"Yes, I did Arym," Stealth replies, walking towards me. "I need for you and Rochelle to venture into Mobius."
Eugh. Mobius. Home of my goody two-shoes twin.
But as long as I'm with Rochelle, nothing bad can happen... right?
I see Rochelle entering the throne room too. Rochelle is unique in this dimension. She's half bat, half cat. The only one of her kind.
"Your first task, when you arrive, is to find Tael. She'll help you in this," Stealth adds.
"And the pink hedgehog?" Rochelle asks.
"Yes. That pink hedgehog will be quite vital to us. If you find her, bring her to me."
We both nod, then bow our heads before leaving.
We don't know who this pink hedgehog us, but we'll know her when we see her.
And as for my goody twin Myra...
I'm coming for you!