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).
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. Re:Zero kara Hajimeru Isekai Seikatsu Episode 19
To capture a realistic sound, they tracked down the specific model of Subaru’s older-era flip phone and recorded the melody directly from its hardware. It is revealed that Wilhelm van Astrea has
They chose the track "Yoake no Michi" (Path of Dawn), which they felt best suited Subaru's character and the atmosphere of the scene. Character Shifts as it killed his wife