If you don't hurry up we'll be late.
Here what kind of pronoun is 'we'?

• If you don't hurry up we'll be late.
- Here, 'we' is - Personal pronoun.

• Personal pronoun:
- A personal pronoun is a short word we use as a simple substitute for the proper name of a person or a thing.
- কোন ব্যক্তি বা বস্তুর নামের পরিবর্তে যে pronoun ব্যবহার করা হয় তাকে Personal pronoun বলে।

• Pronoun ৮ প্রকার। যেমন:
1. Personal pronoun: (I, we, me, it, you, he, she)
2. Demonstrative pronoun: (this, that)
3. Interrogative pronoun: (what, who)
4. Relative pronoun: (what, who, that)
5. Indefinite pronoun: (one, some, any, all, many)
6. Distributive pronoun: (each, every)
7. Reflexive pronoun: (myself, themself)
8. Reciprocal pronoun: (each other, one another)

Source: A Passage to the English Language by S.M. Zakir Hussain.