Cheng Yiyi's "Poison Bullet" Awakening is quite interesting. Each of her bullets carries a poison attack and triggers poison damage five times, with each instance of poison damage calculated independently.
Although the base value of her poison damage is very low, hitting the head of a Night Demon Type I, ordinary bullets could deal hundreds of damage, but poison damage would only be in the single digits. Her poison damage can stack!
Theoretically, as long as she's given enough time, her bullets could poison to death most opponents.
Of course, that's just theory. In practice, the Night Demon Type I would likely be killed by her bullets long before the poison could accumulate.
But this doesn't mean her Awakening is useless; it's simply because Night Demon Type I's HP is low and its defense is weak, preventing her from maximizing her Awakening's capabilities.