A lesser-known pity system in Wuthering Waves is the Echo Pity system. Players are already aware of the Banner Pity system, which prevents them from having too much bad luck when drawing Convene and characters and/or weapons. But beyond that, there is a hidden pity system that works for Echoes, the creatures in the game that you can absorb and equip with your Rover and Resonators.
Echo Pity System Explained | Wuthering Waves
The Echo Pity system means that if you don’t get an Echo drop after defeating a certain number of enemies, you’re guaranteed to get one after reaching a specific threshold. What that threshold is depends on the type of Echo you’re farming.
In Wuthering Waves there are four types of Echoes:
Each class's compassion system is independent, so progress in one class does not affect the other.