Tails Doll is a character that appears in the Sonic the Hedgehog comic series and its spin-offs published by IDW Publishing. He is a robot created by Dr. Eggman in the image of Miles "Tails" Prower. In addition to acting as a surveillance drone, it also serves as Eggman's cuddly toy.
Tails Doll is a mere stuffed animal in design. It greatly resembles Tails, sharing the same head bangs, twin-tails, and orange and white stitching similar to the fox's fur. It has red feet with a white stripe over each foot. It also has a gray zipper leading from the back of its head to its lower back. Additionally, Tails Doll has a metal antenna with a red orb at the end protruding from the top of its head.
Following a night where Dr. Eggman fell asleep with Tails Doll in his arms, a rebellious Heavy King used an override signal to take control of all of Eggman's robots, including Tails Doll. Tails Doll subsequently helped throw Eggman out of his base in Winter Caverns Zone.
Seasons of Chaos
Acting upon the orders of Heavy King, Tails Doll surfaced in Spring Valley Zone where it spied on Amy. It continued to follow Amy from there, observing from a distance as she recruited Mighty and Ray to help her find the Chaos Emeralds. From there, Tails Doll followed the trio to Summer Falls Zone where it observed them as they found the local Chaos Emerald and headed out to find the next one, much to the praise of Heavy King.
When Sonic, Eggman and their collective allies faced Metal Sonic and Metal Knuckles in Winter Caverns Zone, Tails Doll took Eggman and Tails by surprise when it suddenly dropped into the Egg Mobile. Tails Doll was then used by Eggman to boost a jamming signal that freed the Metals from Heavy King's control signal. When Heavy King later was defeated, Tails Doll would be carried around by Eggman as he reinstated Heavy King as his minion. However, after discovering that his former allies had escaped with the Chaos Emeralds, a pouty Eggman would play with Tails Doll.
Although it has the ability to act autonomously, Tails Doll possesses seemingly no personality of its own, being more akin to a drone or the stuff animals it is partially designed after.