Tails had been fighting alongside Sonic and battling Dr. Eggman for some time. The scientist had gone up against the two tailed fox on a number of occasions. Tails may or may not have been alongside Sonic during his battles with the doctor in the following mechs: the Egg Viper, Egg Emperor, and the Egg Dragoon. (StH: #1)
More recently, after getting ahold of a mysterious artifact known as the Phantom Ruby, Dr. Eggman defeated and captured Sonic and conquered the majority of the planet. This caused trauma to the young fox, who had disappeared for a while. Eventually, Tails, alongside the Resistance (formed by Sonic's friends and allies and comprised of many more soldiers), other allies, and a past version of Sonic from an alternate reality, Sonic was freed and helped to stop Dr. Eggman's conquest and save the world from his clutches. This ended in a confrontation between Sonic and Eggman, the latter piloting his latest Death Egg Robot. (StH: #1)
After Sonic managed to defeat Eggman in their previous encounter, the doctor disappeared. However, his robot forces remained, and Tails tried to help stop the robot uprisings as well as rebuild where needed. When Sonic appeared in a town to help fend off a Badnik attack, Tails winded up saving Sonic from a group of Egg Hammers. The two teamed up and took down all of the robots with a mix of attacks, which included the Spin Dash and Rolling Combo. After Sonic and Tails started overcoming the horde of robots, the robots attempted to escape the town, so while Sonic took care of the remaining Egg Hammer, Tails closed one of the town's gates just in time to prevent the robots from leaving, which caused them to crash into the gate and get destroyed. Afterwards, Tails noted that the attack seemed coordinated, which was unlike previous Badnik attacks from other areas. When Sonic suggested it might be Dr. Eggman, Tails did not believe so, as Eggman was known for making sure they knew he had returned before attacking. Sonic decided to continue doing what he had been doing, but Tails expressed his worry over the thought of Sonic losing again, to which the blue hedgehog promised to be more careful. He also suggested that Tails follow him just like old times. Initially, Tails wanted to, but then he decided it was more important to help the town that they had just saved rebuild and recover. Sonic commented on Tails' decision by calling him a class act and stating that they would bash robots again some other time, to which Tails agreed. Unbeknownst to the two of them, a Flapper watched Sonic travel away from the town, which had someone watching the visual feedback and planning their next moves. (StH: #1)
Tails is a young, anthropomorphic fox cub with a unique mutation of two tails instead of one. He has mostly yellow-orange fur with white fur around his muzzle, front torso, and the tips of his tails. He also has blue eyes. Typically, his attire consists simply of white gloves and red shoes with white toes.
Tails is a young fox cub who has a pure and courageous heart. Loyal and trustworthy, he can be counted on to stand firmly by the side of his friends and help them out however he can. While still young, Tails has time and again proven himself to be a force to be reckoned with, especially with his high intellect.
Gifted with a pair of twin tails, Tails can utilize these unique appendages to achieve flight by twirling them around like rotary blades, similar to a helicopter. He is very agile and can keep up with Sonic at quite high speeds. Tails also has a high intellect which has allowed him to construct many machines and devices to help him in his adventures.
Sonic the Hedgehog
Sonic the Hedgehog is Tails' best friend and one who acts as an older brother figure to him. The two of them have been together for a long time, and, as such, have developed a close, brotherly bond. Though Tails tends to get annoyed by Sonic's recklessness and smugness, this does not truly hinder their bond. In fact, the very thought of losing Sonic is enough to greatly worry Tails, especially after he thought Sonic had been killed.
- Head writer Ian Flynn has revealed on Twitter that Tails' measurements are the same as those of his game counterpart.