Etymology: Derived from Japanese 'nai' (奈以 or 菜依), where 'na' can come from 'nami' (waves) or 'sai' (vegetable/greenery), but in this context often used phonetically for its pleasing sound; alternatively linked to 'nai' meaning 'eternal love' in poetic usage or as a variant of names like Naomi. The name is primarily constructed for its euphony rather than strict semantic derivation.