Episode 4 begins with a training session in which Tinasha encourages Oscar to use the magical sword Akashia by pointing out his great potential and her own weaknesses as a witch. This training is not just about combat but also involves a subtle test that reveals Tinasha's interest in Oscar's ability to defeat powerful witches like her.

During the training, other characters observe and comment that Tinasha is clearly teaching Oscar advanced, magically infused combat strategies by blending swordplay and magic—a rare skill among mages, who usually fight from a distance.

The plot thickens with the arrival of Kagar, an envoy from Cuscull, who requests an audience with Tinasha and introduces her under a different name, Aeti. This suggests that her past is catching up to her and that more is at stake than previously known. Kagar asks Tinasha for help with Cuscull, a nation of mages.

Additionally, an undercurrent of political intrigue is introduced through the mysterious maid Miralys, whose presence in the castle hints at ulterior motives that Tinasha suspects but does not openly address.

As the episode progresses, it becomes clear that Oscar's training is part of a larger plan to prepare him for future threats, which may be connected to the mysterious activities in Cuscull and beyond.