Subaru successfully pitches an alliance to Crusch Karsten , offering the specific time and location of the White Whale's appearance in exchange for mining rights to magic stones in Roswaal's domain.
It is revealed that Wilhelm van Astrea has a deep personal vendetta against the White Whale, as it killed his wife, Theresia (the former Sword Saint). Re:Zero kara Hajimeru Isekai Seikatsu Episode 19
The production staff at White Fox was exceptionally meticulous regarding Subaru’s cell phone ringtone: Subaru successfully pitches an alliance to Crusch Karsten