Beastmaster

With their affinity to nature, some rangers have a talent of finding allies among the animals of the wild.

Beast Whisperer

At 3rd level when you choose this archetype, you gain the Beast Friend knack if you don’t already know it, and the beast can be of CR 1/4 or less. In addition, whenever the beast rolls initiative, it gains a number of temporary hit points equal to your level multiplied by your proficiency bonus, and its Armor Class increases by an amount equal to your proficiency bonus.

As a bonus action on your turn, you can order the beast to take an action on its turn. If you order the beast to attack, it adds your proficiency bonus to attack and damage rolls.

Hunter’s Pet

At 7th level, any beast you are the guardian ranger of treats its natural weapons as magical, and gains one of the following features:

Camouflage. The beast can take the Hide action as a bonus action. 

Celerity. The beast can take the Dash action as a bonus action.

Evasion. The beast can take the Dodge action as a bonus action.

Friend of a Friend

At 11th level you can become a guardian ranger to two beasts at once, one of which can be Large.

Loyalty’s Reward

At 15th level, if damage reduces a beast you are the guardian ranger of to 0 hit points, it makes a Constitution saving throw against a DC equal to 10 + the attack modifier of the damaging attack. On a success, the beast drops to 1 hit point instead.

A beast can use this feature once between long rests .