I know Echo got his name for repeating orders and stuff, and I always headcanon part of it is because the word for Twin and Echo are the same in Mando’a and he and Fives are twins and well my whole Domino Squad headcanon, but...
What if part of it was indignantly repeating his brothers words every time they suggest breaking the rules.
Fives: I’m going to go sneak up onto the roof.
Echo: you’re going to sneak onto the roof!
.
Cutup: I’m going to sneak extra rations.
Echo: extra rations!
.
Droidbate: I’m going to run ahead.
Echo: run ahead?
.
Hevy: I might pick a spar with one of the Alphas.
Echo: the Alphas!
.
In the end they just call him Echo because he echos their bad ideas back at them.














