Hints have been provided by Iskall85 on Twitch however first look and mechanics have not been released yet. Check out Iskall85 when he is live to find more spoilers and check back after the next update. Actual Implementation subject to change.16/7/25 - Iskall leaked some of the new models for the legend companions.
Pet Series
Cute Little Elephant is the perfect companion to keep DGA company within the vault.
Best Friends with Janitors Douwsky is never too far away from his Trashpanda
Venus is a very brave pupper. When not running around the vaults chasing iskall they can be found enjoying a nice beer on the sofa.
Mr Wrinkles is a cute loaf of a pug. In his free time you might find him sharing a burger with Carolinet
This cute little moose liked to spend his afternoons curled up infront of a fire reading Wiki books with Mnoose.