Leo Demonheart must prove himself to an elite team of generals in order to officially work for Echidna, the demon queen whom he defeated in the interest of ungrateful human beings.

Leo implements an efficient and collaborative system to make an arduous task easier for Shutina. She is impressed, but not enough to reward him with what he wants.

Leo identifies the flaws in Lili's work and the factors responsible for a slow-moving supply line. He subsequently puts her through a challenge to enhance her abilities.

Disguised as Black Knight Onyx, Leo joins Echidna for dinner and asks her what he wants to know. Shutina and Lili prevent Leo from doing something unwise.

Leo tries to enhance Mernes' communication skills by putting him through some tricky challenges. Mernes seeks the answer to a question that has been bugging him ever since Leo joined Echidna.

Mernes opens up about his childhood and gets certain things off his chest. Leo tells his story and partly answers Mernes' question.