1. Person: This refers to the speaker (first person - "I", "we"), the person being spoken to (second person - "you"), or the person or thing being spoken about (third person - "he", "she", "it", "they").
2. Number: This indicates whether the pronoun is singular (referring to one person or thing) or plural (referring to more than one person or thing). For example, "I" is singular, while "we" is plural.
3. Gender: This distinguishes between masculine ("he", "him"), feminine ("she", "her"), and neuter ("it") pronouns. There are also gender-neutral pronouns like "they" and "them" which can be used for singular or plural individuals, or when someone's gender identity is unknown or not relevant.