User blog comment:Mich, Michele & Kuhla/Future Units Preview/@comment-26940790-20160122195502/@comment-27362456-20160123183438

I was pointing more towards melina because she's the only one who looks related to Alice and Elza. But in Elza's Lore it says how she is the only sibling that shares the same mother as Alice. So that means the Emperor had multiple wives, the first being Elza and Alice's I assume because they were first and second  in line to the throne.