1.
who, what kind of person
Used to question or express uncertainty about someone's identity, background, or nature. Often carries a sense of suspicion, awe, or mystery about the person in question.
おまえは何者だ。
Who are you?
あの男は一体何者なんだ。
Just who on earth is that man?
何者かに侵入された形跡がある。
There are signs that someone broke in.
Differs from simply asking 誰 (who) — 何者 asks about the nature or identity of a person in a deeper sense, often with suspicion or admiration.
COMMON PATTERNS:
- 何者だ (Who are you? — confrontational)
- 何者なのか (who [someone] is — wondering)
- 何者かが (someone [unidentified])
- 何者にもなれない (unable to become anything / anyone significant)
USAGE NOTES:
The pattern 何者か means "someone (unknown)" and is used in formal or literary contexts, similar to 誰か but with a more mysterious or investigative tone. The phrase 何者にもなれない (unable to become anyone) is a common expression conveying existential anxiety.