I’ve read many of the comments and I just want to clarify that the otter insulates you. Meaning yes it will protect you from the cold, however it also helps keep you cool from heat.

Mobile otters can't take the artifacts!I don't know why but they just can't!

Fun fact: If your on mobile, you can just tap on tames and you’ll be able to summon your lost companions.

To the person that lost Otty, I’m not sure if you knew this but if he’s alive, you’ll be able to get him back, he won’t have his inventory items though

These things can incubate a wyvern egg if you boost their melee damage. Also they keep you warm so you could go into the snow biome with no armor but with an otter on your shoulder and still survive

The otter can be very useful for gathering fish meat — it will harvest fish on demand. You can also use it to forage for Silica Pearls, and it will occasionally find Black Pearls.

Dear owner of Henry otter, he is fine you dont need to worry abput him. He was simply accepted into Woghorts and the disappering you saw was simply him entering fish #13 3/4.

They warm you when your cold when on your shoulder

They can hold more than one of the same Artifact

They can hold more than one of the same Artifact