Also why only Shell's pheromones appear pink and sweet to Eric but the other vampire don't.
Eric said Shell smells like flower, it reminds him of the roses.
http://www.mangago.zone/read-manga/blood_bank/mf/c020/16/
But I wonder how it works too, just like when Ellie met White, he said that her pheromone feels comfortable too. Maybe if a vampire has a kind heart their pheromone felt different?
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.... a little spoiler
But in the next chapter Eric pheromone which use to terrified Shell changes too. So it's really confusing.
maybe it's because of love..or bc eric is now able to control his pheromones..or both
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didn't eric once said that shells pheromones smell like roses?