Each character will have a set of side quests that you are going to complete for them if you want 100% completion of Code Vein.
Sophie Side Quest Guide
Sophie is an NPC and Quest Giver in Code Vein. She is a revenant who is keen on researching the powers of the successors. One day, she wishes to better understand it and hopefully, to share it with her fellow revenants. NPCs are individual characters that are encountered during the course of the game that may or may not provide benefits.
First Request: Sophie, the Researcher
Location: Crypt of the Ribcage – Cathedral of the Sacred Blood
Sophie will first appear after you’ve defeated the Successor of the Ribcage at the Cathedral of the Sacred Blood, just make sure to leave the area first, then revisit it to find her at the entrance of the crypt. Speak to her and she’ll mention that she’s fascinated with the power of the successors and wishes to study it in order to harness its power and to share it with the revenants. For the first request, simply head inside the crypt, talk to the Successor of the Ribcage, and you’ll acquire 1x Rib-touched Spike. Hand the item to Sophie and she’ll reward you with 1x Condensed Loss Shard (S) and 1x Isis Chrome.
Second Request: Sophie, the Researcher Part 2
Location: Crypt of the Breath – Ridge of Frozen Souls
After completing Sophie’s first request, she’ll appear at the entrance of the Crypt of the Breath at the Ridge of Frozen Souls only after you’ve defeated the Successor of the Breath. Similar to the first request, she’ll ask you to obtain an item that would help her research. If by any chance you weren’t able to restore Nicola’s memories, then you’ll find the item at the crypt, if you’ve managed to restore Nicola’s memories, then simply speak to his successor form and he’ll give you 1x Breath-touched Snowflake. Return to Sophie and hand in the item, she’ll give you 1x Condensed Loss Shard (M) and 1x Fionn Chrome as a reward
Third Request: Sophie, the Researcher Part 3
Location: City of Falling Flame Entrance – City of Falling Flame
As for Sophie’s last request, she can be found near the entrance that leads to the City of Falling Flame from the Ashen Cavern. She’ll only appear here after you’ve defeated the Successor of the Claw and have completed her first two requests. Upon arriving at the City of Falling Flame Entrance Mistle, retrace your steps back to how you entered the said location and speak to Sophie once you see her. Again, similar to the first two requests, she’ll ask for your help to acquire an item from a successor. Simply teleport to the Back Alley Mistle at the City of Falling Flame and speak to Emily Su in her successor form and she’ll give you 1x Claw-touched Ore, if you weren’t able to save her by restoring her memory, you can find the item inside the crypt. Once you have the item, head back to Sophie’s location and giver her the item and in exchange, you’ll be rewarded with 1x Condensed Loss Shard (L) and 1x Scathach Chrome.