All things considered, I find it fascinating that they've decided to make Yi's temper associated with the sound of a Tiger snarling. Especially given how tigers relate to the overall plot, being both tied to his and Diao's childhood trauma, and how that incident affects the present circumstances.
Also, Yi's breakdown in EP 4 is so messy and raw, like, choking one one's own hyperventilated tears level crying and panic. #MaxKornthas really sells it.