In Code Vein, both humans and revenants roam the world. Most of the NPCs in the game only appear in various locations whenever you’ve activated all the Mistles of a location and have completed its main quest or defeated the boss. Make it a habit that whenever you do complete a location to revisit that explored area for these quest givers to appear and to encounter someone new. It is also recommended that you try to complete all the locations before reaching the final location Gaol of the Stagnant Blood so that all the NPCs will appear in the various locations and it’ll be easier for you to find them whenever you take their requests.
Other Code Vein Guides:
Trial of Blood Quest Guide
Second Request: Trial of Blood (Shang)
Location: Outer Crossroads – Ruined City Underground
For the second request, make sure to leave the location first and teleport back to it if ever he doesn’t ask you for the second request or try to progress the main story. If you return to the Outer Crossroads Mistle at the Ruined City Underground, you’ll find Shang who seems to be catching his breath. Make sure you’ve made further preparations before speaking to him since a Trial of Blood will trigger once you speak to him. Simply survive the onslaught and waves of enemies and kill the last ones to complete the quest, completing the Trial of Blood rewards you with a significant amount of Haze and a consumable item – talk to Shang after the battle and he’ll reward you with 1x Loss Shard (M) and 1x RV Mastery (117)
Trial of the Blood (Lyle)
Location: Crypt Spire Entrance – Crypt Spire
This quest can be triggered during your exploration at the said location or you can do it later on. You’ll find him at about midway of the first section of the location from the Crypt Spire Entrance of the Crypt Spire.
He’s inside one of the large rooms and you’ll find him wounded and resting against the wall, simply talk to him and the Trial of the Blood will trigger. Simply survive the onslaught and kill the last enemy, then speak to him after the trial – he won’t give you any rewards, but you can obtain haze from the trial, as well as 2x Solid Loss Crystal (L) and 1x Awake MJ310.