User blog comment:TerrariamcSwaggins/Hey guys, what is your favorite Pet, VOTE NOW./@comment-1466854-20131124044839

Wisp for light source, cursed sapling for vanity pet (lights up map when it's flying in circles around you), and raven for battle pet.

Would have to add Hydra as well, but there's question whether it really can count. Hard not to love it when you gear properly and get it over 200 base damage though.