Drogos is one of Crake's lieutenants in the Manumits, alongside Sara. He is around when you first meet the rebels, and he points you to Crake after the Ascar business in Distant Shadows.
Distant ShadowsDistant Shadows is a Crake quest where Coen meets Crake at the rebels' hideout and tails Ascar through Tantari by day. Getting spotted gives a worse outcome, so take it slow and hide behind cover.
Rise at DawnRise at Dawn is the ending quest for Crake's questline, where you march on Brencis's castle with the manumit rebels. Save before you start it, because it fails every quest you have not finished.Drogos is one of the people Crake leans on to run the Manumits. He keeps things moving at the hideout when Crake is out or in a mood.
Look for him at the Rebel's Hideout. He matters most at the end of Distant Shadows, and he shows up again near a gate during the assault in Rise at Dawn.
Crake
Crake leads the Manumits, the rebels fighting Brencis, and his chain is the longest optional storyline in the game. He is also a romance option, but he won't trust Coen until your Infamy is high.
Image: Rebel Wolves / Bandai NamcoMarat
Marat leads the Manumits, the rebels fighting the vrakhiri. He is brave and well liked but trusts almost no one, so Coen has to prove himself before the rebels let him in.
Ascar
Ascar is a beekeeper who lives in a hut on the south side of Tantari. Crake has you tail him in the optional quest Distant Shadows, and what you find out explains a lot about Crake.