Does “who” refer to a singular person or many people? The word “who” has no plural. It is a pronoun, meaning we use it to replace a noun. It does not have the power to indicate singularity or plurality because it is an interrogative pronoun.

Who or whom singular or plural?

'Who' does not inflect for number: it is always 'who' as the subject of a clause and 'whom' in all other contexts, whether its antecedent is singular or plural.

Who verb singular or plural?

While "who" might refer to many people, it is treated as singular in an interrogative where the verb acting on the interrogative pronoun isn't a form of "to be". Who lives there? Who does that? Who eats this kind of food?