changer

A changer is someone or something that causes change.

When we talk about a person as a changer, they're usually someone who makes a big impact on others or the world around them. They might be a leader who brings new ideas and creates positive change, like a politician trying to fix problems in their country. They could also be an innovator, developing new technologies that make life easier for people. Sometimes, changers are artists who challenge what's considered normal and inspire others with their unique perspectives.

Note: The word "changer" can also refer to something that changes or replaces something else, like a car changer on a vending machine that gives you your change after buying snacks. This usage is more informal and not as common as the person-based meaning.