Honestly, I'd prefer if it had been designed as a vague homage to Sonic the Hedgehog rather than a wingless, hairless bat with stumpy ostrich legs.
And the leafy underoos are just... over the top.
Really, if they had, say, an earless (or pointed, laid-back-eared), mouthless (or tiny-mouthed) humanoid with a narrow body, extremely smooth, glassy skin, maybe eyes like mercury, and a row of spines or a spined fin running down its spine and back of its head... maybe they lay down at will... same with the limbs, perhaps... give it long, narrow, nasty claws maybe even holes in its hands to reduce drag from palms... or just really narrow palms... maybe give them a weird nostril set up so they can breathe while they run...
It can run and slash (who the heck uses a bite attack at super speeds?), looking fae, and look awesome, with a nice self-defense for when someone tries to grapple them to keep them from using their speed.
And look like Sonic the Hedgehog.
