Questions & Answers about Кое-кто уже ждёт тебя у входа.
Кое-кто means someone or a certain person.
A very useful nuance is this:
- кое-кто often suggests that the speaker has a specific person in mind, but is not naming them
- кто-то is more neutral: just someone
So in this sentence, Кое-кто уже ждёт тебя у входа can feel a bit like:
- Someone is already waiting for you at the entrance
- A certain someone is already waiting for you at the entrance
It can even sound slightly teasing or mysterious, depending on context.
Because кое- is a particle/prefix-like element that forms indefinite pronouns, and in standard Russian spelling it is written with a hyphen:
- кое-кто — someone
- кое-что — something
- кое-какой — some kind of
So the hyphen is not optional here; it is the normal spelling.