I've also wondered this myself, and I just recently saw a character expereince this, and while I don't mention it often, I've thought of Kallera as one of the ones taken in Louisioux ritual to send folks to the future. I've kinda wondered if having the echo would make Kallera OP, yet at the same time, would not having it be fatal against a large array of opponents in the setting? (for example,if one of the big bads someone came up with is ascian, or if Kallera had to fight someone with the echo.)
