Orek

Orek is the glowing blue figure to the right.

Orek is an NPC added to Diablo 3 in the Reaper of Souls expansion pack. He is tied to the Nephalem Rift feature, and introduces your hero to Rifts, as well as providing the experience and gold reward after a Rift is completed (by killing the Rift Guardian).

Orek has limited dialogue and is not involved in any quests or lore during the gameplay or acts; he exists purely as part of the Nephalem Rifts in Adventure Mode.

Redeeming a Rift Bonus

Players need not speak to Orek before opening a Nephalem Rift, which is done by clicking the Nephalem Obelisk.

It is essential to click on him after finishing the Rift though (by killing the Rift Guardian), since only then will he award the gold and experience you've earned. This also starts the thirty second countdown until the Rift closes, after which a new one can be opened by clicking the Nephalem Obelisk.