Stickler (noun)

1. A person who is extremely or overly concerned with adhering to rules, principles, or standards; a person who is meticulous or fastidious.
2. A person who insists on having things done in a certain way.

Origin:

The word "stickler" is derived from the phrase "stick to" which means to adhere strictly to something. it came into use in the late 16th century.

Examples:

1. He's a bit of a stickler for punctuality.
2. She"s a stickler for details and won"t let anything slip through the cracks.
3. He's a stickler for the rules and expects everyone to follow them.
4. The teacher is a stickler for proper grammar and punctuation.
5. She's a stickler for good manners and expects her children to be polite.