者 (mono) means “person” | MotiTan Japanese Dictionary

More examples

経験のある者に任せます。kei ken no a ru mono ni maka se ma su

I will leave it to someone with experience.

Points to a person viewed through a role, condition, or group rather than as an individual by name.

人hito: A person viewed in a broad and neutral sense.
方hō: A person spoken of with respect or politeness.

特定の性質や立場を備えた人。toku tei no sei shitsu ya tachi ba o sona e ta hito

者 (mono) represents the native Japanese word もの (mono, "person" or "one"), and the character itself has the Chinese meaning "person".

The word appears in expressions such as 若い者 (wakamono, "young person"), which can refer to young people as a group and may sound like an older speaker's wording.