에게 is a particle that indicates 'to' a person or animal.
When to use
writing letters, expressing thanks, asking questions
The nuance
1. 에게 is mainly used to indicate to whom an action or feeling is directed, typically a person or animal. 2. It replaces the subject particle (이/가) when indicating the recipient or target. 3. It is more formal and literary; in spoken Korean, 한테 is more common. 4. It attaches directly to a noun without spacing. 5. Used with verbs to complete meanings like 'do something to someone.'
