• Clues to "Little Robin Looking for Brother"
- In the recall task with you, first locate the designated anchor point.
-Step 1: Receive information
- Move up two steps and you will receive a clue delivered by the little robin.
• Sunday Brother’s Secret
- Next, go to Zhou Ben and you need to find a special sticker.
- Tips: Not real stickers in favorites
- This is not your ordinary sticker collection, but the hidden content in Sunday Brother's diary.
• Elegant omnic encounter
- After completing the above steps, go to the place marked on the map above the anchor point.
-Note: Unique character interactions
- There you will find an elegant omnic (possibly a cosplay of a robin), talk to him, and the mystery will be solved.
• About Brother Sunday’s fate
- This hidden achievement may involve the mystery of Brother Sunday's life and death. Players will have a deeper understanding of his story after completing the dialogue.
If you are also curious about this plot, follow these steps and you will be able to unlock the hidden achievement "His Falling Feather" and enjoy the rich story line of "Honkai Impact: Star Rail".