| Event | Synopsis | Trivia |
| This event is not yet released in the Global server of Arknights; the information are based on community-provided translations which may not represent the official localization, to be updated when the event's Global release is announced. |
| This article still uses the original Chinese texts. You can help the Arknights Fandom Wiki by translating it. Please read the translation guidelines first before translating the article. |
Lingering Echoes is the nineteenth major event and thirteenth Side Story in Arknights.
| Release date | |
|---|---|
| CN | June 9, 2022 ~ June 23, 2022 |
| Global | Early December 2022 (estimated) |
Operations
Clear 1-10 to access the LE operations.
| Sunset Hall | LE-ST-1 LE-ST-2 LE-ST-3
|
|---|---|
| Deep Alley |
Deep Alley operations are available in the second week.
All LE operations are worth 28 
.
Operators
The following Operators will gain 50% extra Trust (except from Annihilation):
- Operator Modules can now be upgraded; please see the article and the respective Operators' Modules section for further information.
- Operator Modules added for Mystic Casters and Guardian Defenders.
- The following Operators receive a new Module:
Headhunting
- Main article: Headhunting/Banners/Upcoming
The Dissonanzen headhunting banner is featured.
Music Sheets
All LE operations award 
Music Sheet when cleared, with more being given when the player clears the operation for the first time. Deep Alley operations only award Music Sheets when cleared for the first time.
Music Sheets can be exchanged for various items in the Musician's Mailbox.
The best LE operations to farm Music Sheets are LE-5, LE-6, and LE-7 due to their high 
Sugar Pack, 
Grindstone, and 
Semi-Synthetic Solvent drop rates, respectively.
Spies' Basecamp
The Spies' Basecamp rewards can be claimed until June 30, 2022.
| Mission | Reward | ||
|---|---|---|---|
| Clear LE-1. |
| ||
| Clear LE-2. |
| ||
| Clear LE-3. |
| ||
| Clear LE-4. |
| ||
| Clear LE-5. |
| ||
| Clear LE-5 with 3 stars. |
| ||
| Clear LE-6. |
| ||
| Clear LE-6 with 3 stars. | 仿古木制音箱 | ||
| Clear LE-7. |
| ||
| Clear LE-7 with 3 stars. | “夜幕” | ||
| Clear LE-8. |  100 | ||
| Clear LE-8 with 3 stars. |
| ||
| Clear LE-EX-1. | 60 | ||
| Clear LE-EX-2. | |||
| Clear LE-EX-3. | 80 | ||
| Clear LE-EX-4. | |||
| Clear LE-EX-5. | |||
| Clear LE-EX-6. | |||
| Clear LE-EX-7. | 100 | ||
| Clear LE-EX-8. | |||
| Clear LE-EX-8's Challenge Mode. | 饰牌《宽容》 | ||
| Clear LE operations other than LE-TR-1 and LE-TR-2 15 times. | 80 | ||
| Clear LE operations other than LE-TR-1 and LE-TR-2 45 times. | 100 | ||
| Clear LE operations other than LE-TR-1 and LE-TR-2 85 times. | 120 |
Musician's Mailbox
To buy all items with limited stock from the Musician's Mailbox, the player must spend 4755 .
The Musician's Mailbox is open until June 30, 2022.
| Item | Price | Stock |
|---|---|---|
 1 |
200
|
1 |
| 240
| ||
| 280
| ||
| 320
| ||
| 360
| ||
 1 |
150
|
3 |
 2 |
75
|
2 |
 1 |
100
|
5 |
 1 |
50
|
10 |
 1 |
40
| |
 1 |
30
| |
| 舞台地板 | 50
|
1 |
| 木纹壁纸 | ||
| “合奏” | 40
| |
| “阴云” | 25
|
4 |
| “繁星” | 15
|
5 |
| Item | Price | Stock |
|---|---|---|
 1 |
15
|
10 |
 1 |
5
|
60 |
 1 |
12
|
15 |
 1 |
8
|
10 |
 5K |
7
|
100 |
 2 |
5
|
25 |
 2 |
3
|
50 |
 2 |
1
|
120 |
 1 |
4
|
25 |
 1 |
2
|
50 |
 1 |
4
|
25 |
 1 |
3
| |
 1 |
2
| |
 1 |
4
|
6 |
 10 |
2
|
200 |
20 |
1
|
∞ |
Outfits
The following outfits are available in the Outfit Store:
| New |
|---|
Furniture
The Twilight District Concert Hall furniture set is available; some of its parts are available from Spies' Basecamp and Musician's Mailbox, while others are available in the Furniture Store.
Miscellaneous
Operator Records/Paradox Simulations
New Operator Records/Paradox Simulations are added for the following Operators:
CVs
New CVs are added for the following Operators:
| Operator(s) | CN CV | EN CV | KR CV |
|---|---|---|---|
| Liang Shuang | – | – | |
| Xu Chen | – | – | |
| Vila | – | – | |
| Zhi Mao | – | – | |
| Xiao Mi | – | – | |
| Muyaqilin | – | – | |
| Shisi | – | – | |
| Zhang Hong | – | – | |
| Miao Yang | – | – | |
| Qi Wen | – | – | |
| Z-kun | – | – | |
| Mang Yin | – | – | |
| Ma Yang | – | – | |
| Chen Yanyi | – | – | |
| Jia Yue | – | – | |
| Zhao Yang | – | – |
