>>32605065I'd recommend trying something simpler, but if you're dead set on making this work, my advice as far as the design goes would be something like this-
1. Ditch the literal dragoon armor. Settle for something more like a pelt, like the creature is wearing another dragon-like creature's skin on its back.
2. Use a lighter, less saturated tone for its body, to contrast with the deep blue for the "armor." Eevee's own body color would do well.
3. That tail is an abomination. Settle for something more naturalistic, like simply having a flared point on the end of its tail, all the same color as its body.
4. Maybe style Eevee's ears to suggest horns rather than having ears and also horns. It muddies the visual.
5. That body's all fucked up. Again I recommend working from sprites for existing Eeveelutions to get the shape down.