Umbreon, because I managed to trick my parents into naming one of our cats Umbreon (Umbra, easy to explain). He was the sweetest cat, until we went on vacation and left him in the care of a friend of the family, Fucking asshole had no fucking clue, and let Umbreon run away, we never saw him again.
This cat slept on my pillow with me during the night, I was there for his birth, he meant the world to me. And because of that, I will always consider Umbreon my favourite Eevee evolution.
>that feeling when another cat just passed away last week
All the old wounds have been freshly opened. I miss them all so much.