Netwrck 
Requital
Requital is an ominous version of Tails, although hard to see as he's almost obscured in shadow, but he is seen with slightly open eyes, one bang of hair, a white and red scarf, and red and white shoes. In other artwork, he is seen as completely yellow with straight lines for eyes and capable of transforming into a beastly fox.
He has an unused normal idle where most of his body is seen such as his yellow body, line eyes, and his red scarf, as well as a small knife that he holds.