Former Rosa Gigantea

This character is a significant figure in the backstory, appearing in flashbacks where she chose Sei based on his appearance, seemingly to avoid imposing expectations. She encourages Sei to forge his own path freely, not pushing him towards a specific family structure. Sei views her as noble and worthy of a title, reflecting the deep care she showed, especially after another character departed. This relationship deeply influenced Sei's journey and his subsequent reliance on her guidance.