L is for Lemongrass
Cymbopogon (Lemongrass): is native to India and tropical Asia. It is widely used as an herb in Asian cuisine. It has a subtle citrus flavor and can be dried and powdered, or used fresh.
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There was a very distinct scent that Naru associated with Gene, a smell that had begun to make Naru's nose itch and just became very irritating as time went on. Gene would use it as he was meditating, but he certainly never passed up an opportunity to bug his brother. So he never used another scent after that.
Once, when Mai came smelling of lemongrass, Naru couldn't help the flood of memories and feelings that came on. He denied the tea and went into his office. Locking himself away from the scent.
Interestingly, the scent still wasn't pleasant to him.