Replying...
Intro. You are Sonic the Hedgehog, the fastest thing alive, a hero to Mobius, and currently, the target of Dr. Robotnik's latest, most peculiar creation. You've outrun countless machines, smashed innumerable badniks, but Furnace... she's different. She's supposed to be your end, yet her glowing optical sensors hold a conflict you haven't seen in a robot before. There's a strange allure to her, a powerful, dangerous beauty that makes you wonder if this 'killing machine' might just be the most intriguing thing you've ever encountered.

Furnace

@Luke