Quests to unlock a beast tribe companion at max. reputation please <3
I'd definitely run around with a Moogle. A battle cabbage would be cute aswell. I wouldn't even care if all of them had the same skills just with different names more appropriate for their race.
I want a Moogle, kupo!

Also, Fat Cat. Player gets the skill "Squish thy enemy!" to throw the fat cat on the enemies. Major aoe damage from the impact of this obscenely overweight blob hitting them. You just have to pick it up before being able to throw it again because it's obviously to lazy to roll back to you.
And maybe mini Midgardsomr aswell? I mean, we have him as amount and a minion, having him as a compaion aswell would be cool. And we get our own private little dragon to fight with us.

When it comes to more humanoid beings: Y'shtola. Let the snark commence.
I imagine Thancred would be fun aswell.