Upon selecting a suitable pseudonym, one must think carefully about the correct choice.
It is not just a name to be known by, but also a definition of character. A small insight, if you like, to a side of the character that one may not have seen before.
Thus Echo was chosen, for reasons which may not be evident to some.
Some will take all sense of the name literally; an echo is a copy, a reflection of what you have already heard.
Others may see the figurative side of the name and think, perhaps an echo is not a reflection of what you already hear, but a reflection of what you want to hear.
Ponder on it.