My Favorite Animal Sidekick, Pet, or Summoning (30 Day Anime Challenge, Day 15)

Ooo...animal sidekicks or summonings? It feels like I'm playing Dungeons & Dragons again. (I'm usually--read: always--a druid, so I get the animal sidekick bit.) Now, I don't really watch shows that have those things, and the ones that are present don't "WOW" me. As a general rule, I am uninterested. They tend to annoy me. …