Which is the best pet in Hero Island?

The purpose is different. Snow girl's one-on-one hit is the first, angel nurse's task is the first, fire dragon, phoenix and degenerate angel are good at burning monsters, dragons are rubbish, and demons practice trumpet with revenge. The new Gio should be the first one in the introduction, but I'm not sure if I didn't bring it. By the way, there is actually a more practical thunder, which is good for fighting ancient times, digging doors and digging gold.