Scan Guardians – Mass Effect Wiki Guide


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This page from IGN’s Mass Effect wiki guide is about the Scan the Keeper side quest on the Citadel, including where and how to find all 21 Citadel Guardians.


Assignment statistics

Video guide

Essential statistics

  • Persuasion Points: N / A
  • Minimal decryption: N / A
  • Minimal electronics: N / A

How to Acquire Scan the Keepers

  • Location: Serpent Nebula – Widow – The Citadel

There are several different ways to get Scan the Keepers, two of which are actually during the Jahleed Fears related mission.

  • Speak to Chorban in the Citadel Tower, near the Rapid Transit and at the foot of the stairs leading to the Council Chamber. If you end the conversation earlier, you can always talk to Chorban again to continue the chat and get the mission.
  • If you haven’t spoken to Chorban in the Citadel Tower, then when you encounter Chorban in the Lower Markets during Jahleed’s Scares, you can optionally choose “Scan?” then “Maybe” when they appear.
  • If you didn’t talk to Chorban in the Citadel Tower and accept his offer to scan them in the Lower Markets (or he didn’t offer in the first place), you have one last chance at the end of Jahleed’s Fears. If you can avoid having Jahleed arrested, in the end he will make you one last offer to do the scans (even if you’ve already scanned them all). This is your last chance to accept the mission. Refuse this and you will miss it for good.
    • Jahleed gets arrested if you’re unable to choose the “Then do it legally” or “Take it back!” charm. Intimidate. At this point the C-Sec officer will come back and ask if Jahleed is bothering you. If you then choose “Definitely” or “Yes”, then Jahleed is stopped and you will have completely missed Scan the Keepers.


Rogue players looking for the most Rogue Points will want to ignore Chorban, allowing for a hostile showdown with him in Jahleed’s Fears. This allows you to kill Churban for 9 renegade points.

When you later find Jahleed in C-Sec, if you have 7 charm points or 6 intimidation points, you can persuade him to stop without having him stop, after which Jahleed will ask you to Scan the Guardians.

Regardless of how you acquired this side quest, we’ll start with the Citadel Tower, through C-Sec, Docking Bays, Lower Quarters, Upper Quarters, and finally the Presidium, with a brief detour in the access corridor to the quarters (there are no guards at Chora’s Den or in the lower markets). This route offers the most efficient way to get all Guardians with minimal backtracking.

All of the Keeper location sections on this page are accompanied by maps for ease of use, the numbers corresponding to the text below. The image above is all of the cards combined into a single image.

If you’re playing the Legendary Edition of Mass Effect 1, you’ll only need to scan 20 of the 21 Guardians. Lucky you!

Full Citadel Guardian Map

There are 4 Guardians in this section of the Citadel.

Guardian #1

Guardian #1 is the one Chorban was scanning, located in the small square between the stairs leading to the council chamber and the rock garden overlooked by the rapid transit terminal

Guardian #2

Guardian #2 East-South-East of Guardian #1, on a balcony overlooking a water fountain. Along the way, you may come across Admiral Kahoku, who gives you UNC: Missing Marines.

Guardian #3

Guardian #3 is at the southernmost point of the Citadel tower. He’ll be in the back corner just west of where the Council sits during the Expose Saren hearings, next to a locked door.

Guardian #4

Guardian #4 is in the large gated area that runs along the west side of the Citadel Tower Square. Specifically, it’s in the north corner, near the stairs, where you can talk to Garoth to get the UNC: Privateers mission.

Once you have all four guardians here, take the Rapid Transit to C-Sec.

C-Sec and docking bays

There are 3 Guardians in these two sections of the Citadel.

Goalkeeper #5

Goalkeeper #5 is located in the requisition office on the east side of C-Sec. Drop down, and when you get to the bottom and enter the room, immediately look to your left to find it in the corner.

Goalkeeper #6

Goalkeeper #6 requires a slight detour; enter the central C-Sec elevator to ascend to the docking bays where the Normandy is located. Go all the way to the end of the big main ramp and look in the right corner to find it.

Guardian #7

Guardian #7 is back at C-Sec and is in the traffic control room. From the Academy Atrium in the middle of the area, head upstairs to the C-Sec offices, then continue forward and upstairs to get to traffic control. Here, head for the rail on your right to find this Guardian right after.

Access to Lower Quarters, Upper Quarters, Stream and Quarters

These sections of the Citadel have a total of 6 Guardians. Interestingly, the lower markets, Chora’s Den and Fist’s Office don’t have any at all.

Guardian #8

Guardian #8 is in the small room in the Lower Wards where Eddie Lang hangs out. To get there from Warden #7, return to the Academy Atrium and enter the elevator down the south stairs (the one behind the main elevator to the docking bays). At the bottom, head down the long hallway to where Eddie Lang is; directly in front of you will be this Guardian.

Guardian #9

To go to Guardian #9, from Warden #8, go up the stairs nearby, then at the top, turn left and run east towards the medical clinic. Go to Rapid Transit right after, then look left to spot this guard in the corner.

Guardian #10

To go to Guardian #10 From Warden #9, go to the middle plaza of the Upper Quarters and up the stairs to Flux. Head to the upper area of ​​the Flux Casino, where you can find this guard in the backmost corner, next to where the suspicious gambling machine for the Citadel is/was: Signal Tracking Side Quest.

Guardian #11

Guardian #11 is in the far west of the upper districts. Head to the Upper Markets area on the map, and you can find it in the northwest corner, near where the Volus Expat merchant is.

Guardian #12

Guardian #12 can be found in the red alley, where you will find the quarian towards the end of the Expose Saren mission. Despite the map, it is actually impossible to get there from the upper markets. Instead, head back to the central plaza and go through the door just east of the stairs to Flux. In this small corridor, take the door on the left to enter the Lane; you will find the guard in the corner of the alcove on your right.

Guardian #13

To go to Guardian #13 from guard #12, go back to the small corridor and take a left in the elevator. At the top, you will be in the access to the quarters: face west down the hall, then look to your right for a small room with servers. The 13th Guardian will be here.

The Presidium

There are 8 Guardians in the Presidium area of ​​the Citadel.

Guardian #14

To go to Guardian #14 From Warden #13, continue west down the quarters access hallway and use the elevator at the end. At the top, head down the hall and around the corner to spawn in the plaza where the Presidium Prophet’s side quest is/was. At the end of the hall, look directly left to spot the fourteenth Guardian.

Guardian #15

Guardian #15 can be found directly in front of the elevator leading to the Citadel tower next to Avina, in the northwest corner of the Presidium.

Guardian #16

Guardian #16 can be found in the upper back room of the Emporium. Head to the Emporium on the south side of the Presidium, where Delan the Merchant is. Climb the stairs at the bottom of the area, then turn left. The Guardian will be hidden in the left side of this small room.

Guardian #17

Guardian #17 is located in an area just east of the Emporium. Return to the footbridge by the river and continue east a bit. When you reach the wall blocking the path near the Krogan Memorial Statue, look to your right for a small walkway with the Seventeenth Guardian next to it.

Guardian #18

Guardian #18 is located all the way east of the river walkway in the southern area of ​​the Presidium. From Keeper #17, return to the riverside walkway and follow it under the bridge. You’ll find this guardian next to the door to the consort’s rooms, near some stairs leading to the bridge that crosses the river to the embassies.

Guardian #19

Guardian #19 is located at the most northeastern point of the Presidium, in the Volus and Elcor Office of the Embassies. You can get to Embassies from Warden #18 using the bridge near the Consort Chambers. From there, go up the stairs on the right, through the door, then continue east until you enter the office. Check the back left corner of the room near the window to find Warden #19.

Guardian #20

Guardian #20 is located in an office of the Embassies. to get there, go to the central reception and go up the west staircase. Through the door, look to your right to spot another door that leads to the office; head far west for the guardian.

Guardian #21

To go to Guardian #21, head to the embassy lounge in the western part of the embassies, not too far from where guard #20 is. When you enter the lounge, head straight to the bar and go through the door to the right of it. Turn right and you will see this guard on the other side of the balcony.

Good game!

If you follow our Citadel Assignment Cleanup, your next assignment will be the fan.

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