While the episode does not delve deeply into Yumeko's past, her actions suggest she is driven by a desire for revenge. Her mysterious past is hinted at as she navigates the complex social landscape of St. Dominic's Prep.

The Student Council is not explicitly mentioned in the summaries for this episode, but given the context of the series, they likely continue to be a significant force in the school's social hierarchy and gambling culture.

The episode takes place in a setting where gambling determines social status, and Yumeko's involvement in these games is crucial to her plot to shake up the school's hierarchy. However, specific details about the games in this episode are not provided in the available summaries.

In 'The Speakeasy,' Yumeko discovers a secret at St. Dominic's Prep that has the potential to alter the dynamics of the school's social hierarchy, which is heavily influenced by gambling. However, the specific details of this secret are not explicitly outlined in the available summaries.

Characters like Ryan and Michael appear in scenes where they interact with Yumeko, but they are described as feeling one-dimensional and underutilized, lacking significant development or emotional depth in this episode.