天使般出现的你恶魔般逃走的他
[tiān shĭ bān chū xiàn de nĭ è mó bān táo zŏu de tā]
The phrase describes two different people: one (often the loved one) comes gently like an angel, while another (potentially ex-lover or bad figure) vanishes harshly like an escaping devil. It expresses the stark contrast between good memories of love and betrayal of abandonment.