Millennium Killer Mission Guide
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Millennium Killer is an Adventure Mission in Honkai: Star Rail. Check out how to unlock this mission, its walkthrough, rewards for completion, and all choices in this guide!
List of Contents
How to Unlock Millennium Killer
Complete No Aha at Full Moon
Millennium Killer can be unlocked after reaching Trailblaze Level 34 or above and completing the No Aha at Full Moon mission.
No Aha at Full Moon Mission Guide
Talk to Skuid in Duomension City
Once Millennium Killer is unlocked, you can start the mission by talking to Skuid. She'll be in the large crowd under the footbridge southeast of the Yum Yum Alley Space Anchor.
Duomension City Treasure Chest Locations
Millennium Killer Walkthrough
Mission Walkthrough
- Step 1: Talk to the Emergency Physician
- Step 2: Listen to What Kuchiba Has to Say
- Step 3: Ask About the Millenium Killer Case
- Step 4: Discuss the Case with Sparxie
- Step 5: Discuss the Case with Ashveil
- Step 6: Question Hymes
- Step 7: Interrogate @Lone_Freerider
- Step 8: Question Saliman
- Step 9: Deduce the Truth Behind the Case
- Step 10: Confirm the Murderer's Identity
- Step 11: Decide Who to Team Up With
- Step 12: Return Joye's Eyes to Her
Talk to the Emergency Physician
After seeing what all the commotion is about, an emergency physician will arrive at the scene to tend to Joye. Speak with Dr. Izol to hear their assessment.
Listen to What Kuchiba Has to Say
Kuchiba will also appear to take over the investigation. Talk to her to get the lowdown of the situation.
Ask About the Millenium Killer Case
You'll be asked to lend a hand in catching the culprit before Joye succumbs to her injuries. Once you're ready, speak with Kuchiba to go straight to the tearoom and discuss the main suspect: the Millenium Killer.
Discuss the Case with Sparxie
To gain more clues about the Millennium Killer, you'll have to ask Sparxie for help. After messaging her, head back down and meet Sparxie outside of the tearoom to discuss the case.
Discuss the Case with Ashveil
Sparxie will recommend getting insights from someone who's familiar with Planarcadia's underground world. Head over to Dovebrook District and speak with Ashveil at the Ashen Detective Office on F2.
Once Ashveil joins the investigation, you'll be brought to the Dovebrook Riverside Path to begin searching for witnesses.
Dovebrook District Treasure Chest Locations
Question Hymes
Head a few steps southeast from the Bud of Treasures Calyx to find Hymes and gather intel about the Millenium Killer's potential motives.
Interrogate @Lone_Freerider
After speaking with Hymes, head west and look for @Lone_Freerider. They'll be standing near the Star Rabbit console. @Lone_Freerider will provide insights on the connection between the killer's victims.
Question Saliman
Saliman is the last person to look for. He'll be standing by the Interplanar Jump Difficulty III stage entrance at the northwestern end of the map.
Deduce the Truth Behind the Case
| Prompt | Answer |
|---|---|
| The hidden connection between the victims is... | They've all had plastic surgeries. |
| The Millenium Killer was able to waltz right into the victim's private rooms because... | The victims were hiding something. |
| The identity of the Millenium Killer is obviously... | The plastic surgeon. |
Once you've spoken to all the witnesses, it's time to figure out who the Millennium Killer really is. To quickly deduce the truth behind the case, choose the answers shown above for each of the given prompts.
Confirm the Murderer's Identity
Head northwest from the Dovebrook Avenue Space Anchor to speak with @Lone_Freerider again and confirm the clinic that the Millennium Killer operates at.
Decide Who to Team Up With
 |
|
| Jump to a Path! | |
|---|---|
| Team Up with Ashveil | Team Up with Sparxie |
Head to the front of the Furbobo Weekly Editorial Headquarters building to discuss how to confront the Millennium Killer. You'll need to decide whether to team up with Ashveil or Sparxie. The mission will split into branching paths based on who you choose. Click on the links in the table to see how each route ends!
Team Up with Ashveil
| Millenium Killer - Ashveil Route | |
|---|---|
| 1 |  If you choose to team up with Ashveil, you'll have to confront the killer directly. Head northwest from the @Gate Space Anchor to confirm the killer's identity with Dr. Izol. |
| 2 |  After learning the true identity of the Millennial Killer, head down the path opposite of the @Entertainment Plaza Space Anchor. The killer will be standing in front of a white van. |
| 3 |  You'll have to defeat the Millennial Killer in battle. She'll appear as an Ichor Memosprite: Judge of Oblivion. Use Physical, Ice, or Imaginary characters to take advantage of its weaknesses. A shielder will also be helpful in bringing down her Toughness much faster. |
| 4 |  After the battle, Bartoli Miranda will lose her form and return to a basic wispae. Finish up the conversation to unlock the Hardboiled Detective hidden achievement! |
Team Up with Sparxie
| Millenium Killer - Sparxie Route | |
|---|---|
| 1 |  If you choose to team up with Sparxie, she'll have a different idea up her sleeve. Head up to your desk at Furbobo Weekly to help her make a post. |
| 2 |  After stirring up some controversy, you'll be brought to Duomension City. Follow the quest marker and talk to the Fanatical Sparxhead standing outside the convenience store. |
| 3 |  The killer, under the username Franken_Official, will message you. Sparxie's post has provoked the killer's stolen body parts to attack each other. After ignoring their pleas, continue heading north and speak with the Sparxie Hater. |
| 4 |  Keep following the quest marker to reach and talk to the Fan of the "Fluffy" further north. The Millennium Killer will leave behind some ominous last words before Ashveil summons you and Sparxie back to wrap up the case as witnesses. |
| 5 |  Head to the marked location to meet up with everyone else and witness the end of the Millennium Killer. This unlocks the Armchair Detective hidden achievement! |
Return Joye's Eyes to Her
With the case officially closed, head back to Joye to return her eyes and bring her back from the brink of death. Go through the last conversation to wrap up the mission!
Millennium Killer Rewards
| Mission Rewards | ||
|---|---|---|
 Stellar Jade
x60 |
 Traveler's Guide
x12 |
 Refined Aether
x12 |
 Arcadian Token
x200 |
 Credit
x150000 |
|
Get a Hidden Achievement
| Achievement & How to Get | Reward |
|---|---|
 Hardboiled Detective
(Hidden)The essence of being a "detective" lies in the down-to-earth investigation of truth and the relentless pursuit of evil. |
x5 |
| Armchair Detective
(Hidden) A "detective"? "Investigating the truth"? "Tracking down evil"? Me? Haha, you've gotta be kidding me, right? |
x5 |
Depending on who you team up with to confront the Millenium Killer, you can unlock either the Hardboiled Detective or Armchair Detective hidden achievements! For other Hidden Missions and Achievements, check the guide below.
Honkai: Star Rail Related Guides
All Missions and Mission Types
All Planarcadia Mission Guides
| Planarcadia Mission Guides | A Bouquet for the Blessed | Bring Its Eyes | Legend of the Cosmicon Collective |
|---|---|---|
| Millennium Killer | Star Traveler: Human Transformation | The Comic With No Answers |
| Thirty First Dates | Touched in 8-Bit | |
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