Shade

"With 'Revenge' and 'Ghost' as default Precepts, Shade is well suited for stealth gameplay. Shade also comes with a burst laser pistol."

- In-game Description

This is a sentinel for the stealthy. The Shade's cloaking ability can last a long time, but has a tendancy to go off when running, and it seems the cloak can only be activated if an enemy is within a direct line of sight (for example: it does not activate while hiding behind an object or wall). Also, warframe abilities will not bring you out of stealth and you will remain hidden, as long as another enemy is close by.

Note that infested Runners will still explode when you are next to them, regardless of being cloaked, and enemies such as leapers, rollers, or ancients that have activated their attack (such as a Leaper getting ready to charge) will still hit you after you cloak if you don't move out of the way. On infested levels, take care around Runners as the explosion could knock you out of cloaking range.

Precept Mods
These mods are specifically for the Shade. They grant Shade unique abilities that the Wyrm cannot have. Shade and Wyrm also share some mods. Ranking up the level of sentinels may decrease the cooldown of these abilities. [UNCONFIRMED]

Weapon
The Shade comes with a Burst Laser Pistol. This weapon accepts Pistol Mods and it can also be upgraded like a pistol with an Orokin Catalyst. It fires three shots in rapid succession.

Acquisition
Shade can be bought for 75 and the blueprint for  100,000.

Cosmetics
In patch 7.8 Shade gained new cosmetic attachments to allow for a more unique follower. You can buy and add wings, masks, and a tail.