After the final battle against Kanata Fuyuno, Velguirie's purpose is served, and she disappears as she finally understands her reason for existing in the "Dark Side of Heaven" trap combo

Do not ignore the blue Quest Board in the hub. Quests reward you with (used to upgrade trap level) and new trap schematics.

Why choose Normal? For the majority of players, this is the "intended" path for several reasons:

, specifically whether you use an "Armor Break" on her during key encounters How to Achieve the "Normal" Ending (Ending A)

Normal. Do not mistake me for mercy.