I, who once swore allegiance to the Supreme Sovereign, have lifted my hand against him, and as an undead, I even suffered from a mental control I should not have been subjected to—a disgrace so profound that it stains the very name of a Guardian.
Because of this, Shalltear spent some time in a daze, drowning her sorrows in drink every day, which shows how intense her regret was.
Thanks to that event, this time upon receiving a new mission from Ainz, Shalltear had taken an oath that she must not bring shame to Nasalik or to the Guardians ever again.
Therefore, during this mission, Shalltear was uncharacteristically serious, not only abandoning her previous disdain and contempt for others but also diligently making all sorts of preparations, truly doing her homework.
Among these preparations were gathering intelligence and collecting data, everything concerning people, events, and objects related to the mission, which she thoroughly investigated and recorded in her notebook.