A "Lumina" in the context of Clair Obscur: Expedition 33 refers to special abilities that players internalize by using items called Pictos in battle repeatedly. Specifically, after using a Picto enough times in combat, the character learns the associated Lumina ability, which can then be equipped and used by others in the party. Lumina abilities provide various passive powers that can significantly enhance a player's combat effectiveness, sometimes with beneficial effects and occasionally with some drawbacks, depending on the gameplay style

. This definition comes from the game's lore and mechanics, where Lumina are key to character progression and combat strategy. They are not personality traits or scientific terms here, but rather in-game abilities gained through experience with Pictos. If you are referring to "Lumina" outside this game context, it can also mean:

• In personality assessment, Lumina refers to a model measuring personality traits and preferences, distinct from typologies like MBTI, focusing on multiple personas and traits rather than fixed types

• In physics, "lumina" relates to luminous flux units (lumens), measuring light intensity

• In biology, "lumen" (singular of lumina) refers to the cavity or channel within a tubular structure like blood vessels or plant cells

But for your query about Expedition 33, the relevant meaning is the in-game abilities internalized by using Pictos in battle