Character: yacker
Yacker is a Wisp who was befriended by Sonic and Tails while they were on Dr. Eggman's interstellar amusement park, and together they fought to free the Wisps from being enslaved by Eggman. The full details of their adventure are not yet known. Save for the fact that there were two told stories of their adventure, so you can never know for sure how their story really went.
Yacker is unable to speak the same language as Sonic and Tails, so to go around this, Tails invented a translator to communicate with Yacker.
What makes this wisp special is the little spiral of hair that's on his head.