also: もん
noun
person; someone of a certain type
Used to refer to a person, often with a qualifying phrase. Rarely used alone; typically appears in constructions like ...する者, ...の者, or after adjectives. The reading もん is more casual.
この仕事を任せられる者は彼しかいない。
He is the only person who can be entrusted with this job.
そんなことをする者は許せない。
I can't forgive anyone who does such a thing.