Umbreon is a Dark-type Pokémon. It evolves from Eevee if it has a friendship during the night. When the night falls, it becomes excited and its golden rings on its body glows up. When agitated, it will spray poisonous sweat from its pores. For its voice, I would recommend a voice that would make it sound sort of serious and defensive, but also kind of playful as well. I listed "any gender" on this male role, because female voice actors can audition for this too.