Requests from a Friend: Zenon is a side quest in Code Vein 2 that becomes available after you defeat Zenon during the Slaying the Hero Zenon main quest. The questline tasks you with accompanying Zenon to various locations that hold significance to his past, triggering cutscenes that restore fragments of his memory. Completing this request rewards you with Zenon's Accessory and several Memory Fragments.
Quick answer: Travel to MagMell during the 2197: Free Exploration Era, speak to Zenon through the northeastern door in Valentin's desk room, then visit the Ruins Mistle on MagMell Island, followed by three places of remembrance in the Sunken City, Corroded Scar, and Undead Forest.

Prerequisites for starting the quest
You must first complete the Slaying the Hero Zenon quest in the present timeline. This main quest unlocks after finishing all three mainland hero quests: Slaying the Hero Josee, Slaying the Hero Lyle, and Slaying the Hero Holly. Once Zenon has been defeated, travel to the 2197: Free Exploration Era through MagMell to begin his friendship request.
The quest will not trigger if you have another active quest running. Make sure any Timeline Shift Decisions or Fading Bonds questlines are either completed or inactive before attempting to start this one.
Finding Zenon in MagMell
Step 1: Travel to MagMell during the 2187/2197: Free Exploration Era. Head to the room containing Valentin's desk.
Step 2: Look for a door on the northeastern side of the room. Pass through it to find Zenon waiting behind it.
Step 3: Speak with Zenon and select "Catch Up" to initiate the quest. After the conversation, you receive Glowing Haze 17 as an initial reward.

Zenon's Request: MagMell Island ruins
The first objective involves accompanying Zenon to stimulate his hippocampus and restore important memories. With Zenon set as your partner, travel to the Ruins Mistle located in the southern part of MagMell Island. Approaching the location automatically triggers a cutscene showing Zenon processing fragments of his past.
After the cutscene concludes, you receive Zenon's Memory Fragment 1. This completes the initial phase and unlocks the second part of the quest, which requires visiting three additional places of remembrance spread across the mainland regions.
Zenon's Request 2: Sunken City location
The Sunken City place of remembrance sits atop a skyscraper at the Western Gatehouse Ruins. With Zenon as your partner, travel to the Western Gatehouse Ruins Mistle and enter the dungeon area. Navigate to the broken building at the far end and take the elevator up to the roof.
Reaching the rooftop triggers a cutscene. Once it finishes, you receive Zenon's Memory Fragment 2. The elevator provides a direct route, so there's no need to fight through the entire dungeon if you've already unlocked the shortcut.

Zenon's Request 2: Corroded Scar location
Travel to the Miners' Rest Stop Mistle in the Corroded Scar region. This location sits southwest of Pioneer Castle. From the Mistle, head south toward the nearby Tower of Regeneration. Approaching the tower with Zenon triggers the memory cutscene.
Completing this sequence awards Zenon's Memory Fragment 4. The numbering may seem out of order, but the fragments are labeled based on the chronology of Zenon's memories rather than the order you collect them.
Zenon's Request 2: Undead Forest location
The final place of remembrance is at the Snowy Mountain Amusement Park in the Undead Forest. Travel to the Snowy Mountain Amusement Park Mistle, and enter the dungeon. Head toward the center of the park where a merry-go-round (carousel) stands.
Approaching the carousel with Zenon as your partner triggers the final memory cutscene. You receive Zenon's Memory Fragment 3 upon completion.

Quest completion and rewards
After visiting all three places of remembrance, you are automatically teleported back to MagMell. A final cutscene plays, showing the culmination of Zenon's memory restoration journey. When the cutscene ends, you receive Zenon's Accessory as the quest completion reward.
The full reward breakdown for Requests from a Friend: Zenon includes Glowing Haze 17 from the initial conversation, four Memory Fragments collected during the journey, and Zenon's Accessory as the final prize. All objectives must be completed during the 2187/2197: Free Exploration Era timeline, so avoid switching back to the present until you've finished the entire questline.

Important timing considerations
Every step of this quest must be completed in the same time period where you accepted it. Since Requests from a Friend: Zenon unlocks in the Free Exploration Era, all visits to the places of remembrance must occur during that timeline. Switching to 2277: The Present before finishing will prevent progress.
Completing this quest also unlocks additional content. After finishing Requests from a Friend: Zenon and turning in 26 Uncanny Stones to Jadwiga, you can speak with Jadwiga for a follow-up interaction. This creates a natural progression path for players working through multiple partner questlines simultaneously.
The Requests from a Friend: Zenon questline offers insight into the character's backstory while providing useful rewards. The Memory Fragments serve as collectible lore items, and Zenon's Accessory adds to your cosmetic options. With all locations marked on your map after accepting the quest, navigation remains straightforward as long as you keep Zenon as your active partner throughout.